664560475 has 6 divisors (see below), whose sum is σ = 824055020. Its totient is φ = 531648360.

The previous prime is 664560461. The next prime is 664560493. The reversal of 664560475 is 574065466.

It is a happy number.

It is not a de Polignac number, because 664560475 - 2⁹ = 664559963 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13291185 + ... + 13291234.

Almost surely, 2^664560475 is an apocalyptic number.

664560475 is a deficient number, since it is larger than the sum of its proper divisors (159494545).

664560475 is a wasteful number, since it uses less digits than its factorization.

664560475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26582429 (or 26582424 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The square root of 664560475 is about 25779.0704836307. The cubic root of 664560475 is about 872.6595302746.

The spelling of 664560475 in words is "six hundred sixty-four million, five hundred sixty thousand, four hundred seventy-five".