665167116 has 12 divisors (see below), whose sum is σ = 1552056632. Its totient is φ = 221722368.

The previous prime is 665167103. The next prime is 665167117. The reversal of 665167116 is 611761566.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (665167117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27715285 + ... + 27715308.

Almost surely, 2^665167116 is an apocalyptic number.

It is an amenable number.

665167116 is an abundant number, since it is smaller than the sum of its proper divisors (886889516).

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

665167116 is a wasteful number, since it uses less digits than its factorization.

665167116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55430600 (or 55430598 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 665167116 is about 25790.8339531703. The cubic root of 665167116 is about 872.9249839429.

The spelling of 665167116 in words is "six hundred sixty-five million, one hundred sixty-seven thousand, one hundred sixteen".