665522075 has 6 divisors (see below), whose sum is σ = 825247404. Its totient is φ = 532417640.

The previous prime is 665522047. The next prime is 665522083. The reversal of 665522075 is 570225566.

It is a de Polignac number, because none of the positive numbers 2^k-665522075 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13310417 + ... + 13310466.

It is an arithmetic number, because the mean of its divisors is an integer number (137541234).

Almost surely, 2^665522075 is an apocalyptic number.

665522075 is a deficient number, since it is larger than the sum of its proper divisors (159725329).

665522075 is a wasteful number, since it uses less digits than its factorization.

665522075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26620893 (or 26620888 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 665522075 is about 25797.7145305548. The cubic root of 665522075 is about 873.0802318858.

The spelling of 665522075 in words is "six hundred sixty-five million, five hundred twenty-two thousand, seventy-five".