665190052 has 24 divisors (see below), whose sum is σ = 1205487360. Its totient is φ = 320789280.

The previous prime is 665190047. The next prime is 665190083. The reversal of 665190052 is 250091566.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135277 + ... + 140107.

It is an arithmetic number, because the mean of its divisors is an integer number (50228640).

Almost surely, 2^665190052 is an apocalyptic number.

It is an amenable number.

665190052 is a deficient number, since it is larger than the sum of its proper divisors (540297308).

665190052 is a wasteful number, since it uses less digits than its factorization.

665190052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051 (or 6049 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 665190052 is about 25791.2786034349. The cubic root of 665190052 is about 872.9350170994.

The spelling of 665190052 in words is "six hundred sixty-five million, one hundred ninety thousand, fifty-two".