64680912 has 30 divisors (see below), whose sum is σ = 181017122. Its totient is φ = 21560256.

The previous prime is 64680907. The next prime is 64680919. The reversal of 64680912 is 21908646.

64680912 is a `hidden beast` number, since 646 + 8 + 0 + 9 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 63297936 + 1382976 = 7956^2 + 1176^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64680919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 224443 + ... + 224730.

Almost surely, 2^64680912 is an apocalyptic number.

It is an amenable number.

64680912 is an abundant number, since it is smaller than the sum of its proper divisors (116336210).

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

64680912 is a wasteful number, since it uses less digits than its factorization.

64680912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449187 (or 449178 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 64680912 is about 8042.4444045327. Note that the first 4 decimals coincide. The cubic root of 64680912 is about 401.4135653646.

The spelling of 64680912 in words is "sixty-four million, six hundred eighty thousand, nine hundred twelve".