664336807 has 8 divisors (see below), whose sum is σ = 693514080. Its totient is φ = 635184000.

The previous prime is 664336769. The next prime is 664336811. The reversal of 664336807 is 708633466.

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 664336807 - 2⁷ = 664336679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664336877) 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, 69307 + ... + 78307.

It is an arithmetic number, because the mean of its divisors is an integer number (86689260).

Almost surely, 2^664336807 is an apocalyptic number.

664336807 is a deficient number, since it is larger than the sum of its proper divisors (29177273).

664336807 is a wasteful number, since it uses less digits than its factorization.

664336807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12233.

The product of its (nonzero) digits is 435456, while the sum is 43.

The square root of 664336807 is about 25774.7319481697. The cubic root of 664336807 is about 872.5616169816.

The spelling of 664336807 in words is "six hundred sixty-four million, three hundred thirty-six thousand, eight hundred seven".