665576625 has 32 divisors (see below), whose sum is σ = 1265741568. Its totient is φ = 304262400.

The previous prime is 665576579. The next prime is 665576629. The reversal of 665576625 is 526675566.

It is not a de Polignac number, because 665576625 - 2¹¹ = 665574577 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (665576629) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 124152 + ... + 129401.

It is an arithmetic number, because the mean of its divisors is an integer number (39554424).

Almost surely, 2^665576625 is an apocalyptic number.

It is an amenable number.

665576625 is a deficient number, since it is larger than the sum of its proper divisors (600164943).

665576625 is a wasteful number, since it uses less digits than its factorization.

665576625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253578 (or 253568 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 48.

The square root of 665576625 is about 25798.7717730903. The cubic root of 665576625 is about 873.1040854524.

The spelling of 665576625 in words is "six hundred sixty-five million, five hundred seventy-six thousand, six hundred twenty-five".