64680750 has 192 divisors, whose sum is σ = 197121600. Its totient is φ = 15206400.

The previous prime is 64680743. The next prime is 64680757. The reversal of 64680750 is 5708646.

It is a happy number.

64680750 is a `hidden beast` number, since 646 + 8 + 0 + 7 + 5 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (64680743) and next prime (64680757).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64680757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 726706 + ... + 726794.

It is an arithmetic number, because the mean of its divisors is an integer number (1026675).

Almost surely, 2^64680750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64680750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98560800).

64680750 is an abundant number, since it is smaller than the sum of its proper divisors (132440850).

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

64680750 is a wasteful number, since it uses less digits than its factorization.

64680750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 64680750 is about 8042.4343329616. The cubic root of 64680750 is about 401.4132302371.

The spelling of 64680750 in words is "sixty-four million, six hundred eighty thousand, seven hundred fifty".