64972707 has 4 divisors (see below), whose sum is σ = 86630280. Its totient is φ = 43315136.

The previous prime is 64972679. The next prime is 64972711. The reversal of 64972707 is 70727946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64972707 - 2⁶ = 64972643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64972727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10828782 + ... + 10828787.

It is an arithmetic number, because the mean of its divisors is an integer number (21657570).

Almost surely, 2^64972707 is an apocalyptic number.

64972707 is a deficient number, since it is larger than the sum of its proper divisors (21657573).

64972707 is a wasteful number, since it uses less digits than its factorization.

64972707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21657572.

The product of its (nonzero) digits is 148176, while the sum is 42.

The square root of 64972707 is about 8060.5649305740. The cubic root of 64972707 is about 402.0162922532.

The spelling of 64972707 in words is "sixty-four million, nine hundred seventy-two thousand, seven hundred seven".