64656884667 has 16 divisors (see below), whose sum is σ = 91160616960. Its totient is φ = 40696699200.

The previous prime is 64656884641. The next prime is 64656884693. The reversal of 64656884667 is 76648865646.

It is an interprime number because it is at equal distance from previous prime (64656884641) and next prime (64656884693).

It is not a de Polignac number, because 64656884667 - 2²⁴ = 64640107451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64656884598 and 64656884607.

It is not an unprimeable number, because it can be changed into a prime (64656884867) 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, 8474667 + ... + 8482292.

It is an arithmetic number, because the mean of its divisors is an integer number (5697538560).

Almost surely, 2^64656884667 is an apocalyptic number.

64656884667 is a deficient number, since it is larger than the sum of its proper divisors (26503732293).

64656884667 is a wasteful number, since it uses less digits than its factorization.

64656884667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16957034.

The product of its digits is 278691840, while the sum is 66.

The spelling of 64656884667 in words is "sixty-four billion, six hundred fifty-six million, eight hundred eighty-four thousand, six hundred sixty-seven".