64818680 has 16 divisors (see below), whose sum is σ = 145842120. Its totient is φ = 25927456.

The previous prime is 64818667. The next prime is 64818697. The reversal of 64818680 is 8681846.

It is a super-2 number, since 2×64818680² = 8402922553884800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810194 + ... + 810273.

Almost surely, 2^64818680 is an apocalyptic number.

It is an amenable number.

64818680 is an abundant number, since it is smaller than the sum of its proper divisors (81023440).

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

64818680 is a wasteful number, since it uses less digits than its factorization.

64818680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620478 (or 1620474 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 64818680 is about 8051.0049062213. The cubic root of 64818680 is about 401.6983620434.

The spelling of 64818680 in words is "sixty-four million, eight hundred eighteen thousand, six hundred eighty".