664675507 has 2 divisors, whose sum is σ = 664675508. Its totient is φ = 664675506.

The previous prime is 664675493. The next prime is 664675519. The reversal of 664675507 is 705576466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664675507 - 2¹¹ = 664673459 is a prime.

It is not a weakly prime, because it can be changed into another prime (664670507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332337753 + 332337754.

It is an arithmetic number, because the mean of its divisors is an integer number (332337754).

Almost surely, 2^664675507 is an apocalyptic number.

664675507 is a deficient number, since it is larger than the sum of its proper divisors (1).

664675507 is an equidigital number, since it uses as much as digits as its factorization.

664675507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 46.

The square root of 664675507 is about 25781.3014993425. The cubic root of 664675507 is about 872.7098783284.

The spelling of 664675507 in words is "six hundred sixty-four million, six hundred seventy-five thousand, five hundred seven".