665293992 has 64 divisors (see below), whose sum is σ = 1817380800. Its totient is φ = 201277440.

The previous prime is 665293991. The next prime is 665294009. The reversal of 665293992 is 299392566.

665293992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (665293991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198184 + ... + 201512.

It is an arithmetic number, because the mean of its divisors is an integer number (28396575).

Almost surely, 2^665293992 is an apocalyptic number.

It is an amenable number.

665293992 is an abundant number, since it is smaller than the sum of its proper divisors (1152086808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665293992 is a wasteful number, since it uses less digits than its factorization.

665293992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106 (or 4102 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 51.

The square root of 665293992 is about 25793.2935469668. The cubic root of 665293992 is about 872.9804818704.

The spelling of 665293992 in words is "six hundred sixty-five million, two hundred ninety-three thousand, nine hundred ninety-two".