64636697 has 8 divisors (see below), whose sum is σ = 66269280. Its totient is φ = 63010080.

The previous prime is 64636681. The next prime is 64636699. The reversal of 64636697 is 79663646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64636697 - 2⁴ = 64636681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64636699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27197 + ... + 29477.

It is an arithmetic number, because the mean of its divisors is an integer number (8283660).

Almost surely, 2^64636697 is an apocalyptic number.

It is an amenable number.

64636697 is a deficient number, since it is larger than the sum of its proper divisors (1632583).

64636697 is a wasteful number, since it uses less digits than its factorization.

64636697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983.

The product of its digits is 979776, while the sum is 47.

The square root of 64636697 is about 8039.6950812826. The cubic root of 64636697 is about 401.3220775465.

The spelling of 64636697 in words is "sixty-four million, six hundred thirty-six thousand, six hundred ninety-seven".