664345107 has 6 divisors (see below), whose sum is σ = 959609612. Its totient is φ = 442896732.

The previous prime is 664345093. The next prime is 664345109. The reversal of 664345107 is 701543466.

It is a happy number.

664345107 is a `hidden beast` number, since 6 + 643 + 4 + 5 + 1 + 0 + 7 = 666.

It is not a de Polignac number, because 664345107 - 2⁷ = 664344979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664345109) 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, 36908053 + ... + 36908070.

Almost surely, 2^664345107 is an apocalyptic number.

664345107 is a deficient number, since it is larger than the sum of its proper divisors (295264505).

664345107 is a wasteful number, since it uses less digits than its factorization.

664345107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73816129 (or 73816126 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 664345107 is about 25774.8929580707. The cubic root of 664345107 is about 872.5652507966.

The spelling of 664345107 in words is "six hundred sixty-four million, three hundred forty-five thousand, one hundred seven".