64775700 has 180 divisors, whose sum is σ = 229381152. Its totient is φ = 15681600.

The previous prime is 64775681. The next prime is 64775719. The reversal of 64775700 is 757746.

64775700 is a `hidden beast` number, since 647 + 7 + 5 + 7 + 0 + 0 = 666.

64775700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64775681) and next prime (64775719).

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 88737 + ... + 89463.

Almost surely, 2^64775700 is an apocalyptic number.

64775700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64775700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114690576).

64775700 is an abundant number, since it is smaller than the sum of its proper divisors (164605452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64775700 is a wasteful number, since it uses less digits than its factorization.

64775700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 64775700 is about 8048.3352315867. The cubic root of 64775700 is about 401.6095563008.

The spelling of 64775700 in words is "sixty-four million, seven hundred seventy-five thousand, seven hundred".