665165016 has 48 divisors (see below), whose sum is σ = 1859607360. Its totient is φ = 214568640.

The previous prime is 665164957. The next prime is 665165029. The reversal of 665165016 is 610561566.

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 11 ways as a sum of consecutive naturals, for example, 146775 + ... + 151238.

It is an arithmetic number, because the mean of its divisors is an integer number (38741820).

Almost surely, 2^665165016 is an apocalyptic number.

It is an amenable number.

665165016 is an abundant number, since it is smaller than the sum of its proper divisors (1194442344).

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

665165016 is a wasteful number, since it uses less digits than its factorization.

665165016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298056 (or 298049 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 665165016 is about 25790.7932409998. The cubic root of 665165016 is about 872.9240653044.

The spelling of 665165016 in words is "six hundred sixty-five million, one hundred sixty-five thousand, sixteen".