64818668 has 6 divisors (see below), whose sum is σ = 113432676. Its totient is φ = 32409332.

The previous prime is 64818667. The next prime is 64818697. The reversal of 64818668 is 86681846.

It is not an unprimeable number, because it can be changed into a prime (64818667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8102330 + ... + 8102337.

It is an arithmetic number, because the mean of its divisors is an integer number (18905446).

Almost surely, 2^64818668 is an apocalyptic number.

It is an amenable number.

64818668 is a deficient number, since it is larger than the sum of its proper divisors (48614008).

64818668 is a wasteful number, since it uses less digits than its factorization.

64818668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16204671 (or 16204669 counting only the distinct ones).

The product of its digits is 442368, while the sum is 47.

The square root of 64818668 is about 8051.0041609727. The cubic root of 64818668 is about 401.6983372543.

The spelling of 64818668 in words is "sixty-four million, eight hundred eighteen thousand, six hundred sixty-eight".