665797772 has 24 divisors (see below), whose sum is σ = 1247265600. Its totient is φ = 310030416.

The previous prime is 665797751. The next prime is 665797837. The reversal of 665797772 is 277797566.

665797772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

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, 69758 + ... + 78725.

It is an arithmetic number, because the mean of its divisors is an integer number (51969400).

Almost surely, 2^665797772 is an apocalyptic number.

It is an amenable number.

665797772 is a deficient number, since it is larger than the sum of its proper divisors (581467828).

665797772 is a wasteful number, since it uses less digits than its factorization.

665797772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148565 (or 148563 counting only the distinct ones).

The product of its digits is 7779240, while the sum is 56.

The square root of 665797772 is about 25803.0574157405. The cubic root of 665797772 is about 873.2007750300.

The spelling of 665797772 in words is "six hundred sixty-five million, seven hundred ninety-seven thousand, seven hundred seventy-two".