665331516 has 48 divisors (see below), whose sum is σ = 1826405280. Its totient is φ = 208730880.

The previous prime is 665331503. The next prime is 665331523. The reversal of 665331516 is 615133566.

665331516 is a `hidden beast` number, since 66 + 53 + 31 + 516 = 666.

665331516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179355 + ... + 183026.

It is an arithmetic number, because the mean of its divisors is an integer number (38050110).

Almost surely, 2^665331516 is an apocalyptic number.

It is an amenable number.

665331516 is an abundant number, since it is smaller than the sum of its proper divisors (1161073764).

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

665331516 is a wasteful number, since it uses less digits than its factorization.

665331516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362411 (or 362403 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 665331516 is about 25794.0209350927. The cubic root of 665331516 is about 872.9968942155.

The spelling of 665331516 in words is "six hundred sixty-five million, three hundred thirty-one thousand, five hundred sixteen".