664272807 has 32 divisors (see below), whose sum is σ = 1025685504. Its totient is φ = 377932800.

The previous prime is 664272779. The next prime is 664272839. The reversal of 664272807 is 708272466.

It is not a de Polignac number, because 664272807 - 2⁸ = 664272551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664272887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255082 + ... + 257672.

It is an arithmetic number, because the mean of its divisors is an integer number (32052672).

Almost surely, 2^664272807 is an apocalyptic number.

664272807 is a deficient number, since it is larger than the sum of its proper divisors (361412697).

664272807 is a wasteful number, since it uses less digits than its factorization.

664272807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079.

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 664272807 is about 25773.4903922616. The cubic root of 664272807 is about 872.5335961864.

The spelling of 664272807 in words is "six hundred sixty-four million, two hundred seventy-two thousand, eight hundred seven".