64680012 has 48 divisors (see below), whose sum is σ = 173107200. Its totient is φ = 20863440.

The previous prime is 64679999. The next prime is 64680017. The reversal of 64680012 is 21008646.

64680012 is a `hidden beast` number, since 646 + 8 + 0 + 0 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64680017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6312 + ... + 13007.

It is an arithmetic number, because the mean of its divisors is an integer number (3606400).

Almost surely, 2^64680012 is an apocalyptic number.

64680012 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

64680012 is an abundant number, since it is smaller than the sum of its proper divisors (108427188).

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

64680012 is a wasteful number, since it uses less digits than its factorization.

64680012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19363 (or 19355 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 64680012 is about 8042.3884512003. The cubic root of 64680012 is about 401.4117035382.

Adding to 64680012 its reverse (21008646), we get a palindrome (85688658).

The spelling of 64680012 in words is "sixty-four million, six hundred eighty thousand, twelve".