664712075 has 48 divisors (see below), whose sum is σ = 899942400. Its totient is φ = 485548800.

The previous prime is 664712071. The next prime is 664712077. The reversal of 664712075 is 570217466.

It is not a de Polignac number, because 664712075 - 2² = 664712071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664712071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1586216 + ... + 1586634.

It is an arithmetic number, because the mean of its divisors is an integer number (18748800).

Almost surely, 2^664712075 is an apocalyptic number.

664712075 is a deficient number, since it is larger than the sum of its proper divisors (235230325).

664712075 is a wasteful number, since it uses less digits than its factorization.

664712075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 664712075 is about 25782.0106857475. The cubic root of 664712075 is about 872.7258824634.

The spelling of 664712075 in words is "six hundred sixty-four million, seven hundred twelve thousand, seventy-five".