64766940 has 192 divisors, whose sum is σ = 225275904. Its totient is φ = 13565952.

The previous prime is 64766929. The next prime is 64766951. The reversal of 64766940 is 4966746.

It is an interprime number because it is at equal distance from previous prime (64766929) and next prime (64766951).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 64766892 and 64766901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 335484 + ... + 335676.

It is an arithmetic number, because the mean of its divisors is an integer number (1173312).

Almost surely, 2^64766940 is an apocalyptic number.

64766940 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 64766940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112637952).

64766940 is an abundant number, since it is smaller than the sum of its proper divisors (160508964).

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

64766940 is a wasteful number, since it uses less digits than its factorization.

64766940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 64766940 is about 8047.7910012624. The cubic root of 64766940 is about 401.5914514749.

The spelling of 64766940 in words is "sixty-four million, seven hundred sixty-six thousand, nine hundred forty".