664900713 has 6 divisors (see below), whose sum is σ = 960412154. Its totient is φ = 443267136.

The previous prime is 664900711. The next prime is 664900727. The reversal of 664900713 is 317009466.

664900713 is a `hidden beast` number, since 6 + 649 + 0 + 0 + 7 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 456762384 + 208138329 = 21372^2 + 14427^2 .

It is not a de Polignac number, because 664900713 - 2¹ = 664900711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664900711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36938920 + ... + 36938937.

Almost surely, 2^664900713 is an apocalyptic number.

It is an amenable number.

664900713 is a deficient number, since it is larger than the sum of its proper divisors (295511441).

664900713 is a wasteful number, since it uses less digits than its factorization.

664900713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73877863 (or 73877860 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 664900713 is about 25785.6687522352. The cubic root of 664900713 is about 872.8084313345.

The spelling of 664900713 in words is "six hundred sixty-four million, nine hundred thousand, seven hundred thirteen".