665363772 has 36 divisors (see below), whose sum is σ = 1717681056. Its totient is φ = 217068480.

The previous prime is 665363767. The next prime is 665363843. The reversal of 665363772 is 277363566.

665363772 is a `hidden beast` number, since 6 + 6 + 5 + 3 + 637 + 7 + 2 = 666.

665363772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194929 + ... + 198312.

Almost surely, 2^665363772 is an apocalyptic number.

It is an amenable number.

665363772 is an abundant number, since it is smaller than the sum of its proper divisors (1052317284).

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

665363772 is a wasteful number, since it uses less digits than its factorization.

665363772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393298 (or 393293 counting only the distinct ones).

The product of its digits is 952560, while the sum is 45.

The square root of 665363772 is about 25794.6461886958. The cubic root of 665363772 is about 873.0110019358.

The spelling of 665363772 in words is "six hundred sixty-five million, three hundred sixty-three thousand, seven hundred seventy-two".