665167170015 has 24 divisors (see below), whose sum is σ = 1155323933088. Its totient is φ = 354027360960.

The previous prime is 665167169941. The next prime is 665167170067. The reversal of 665167170015 is 510071761566.

665167170015 is a `hidden beast` number, since 66 + 516 + 7 + 1 + 70 + 0 + 1 + 5 = 666.

It is not a de Polignac number, because 665167170015 - 2¹¹ = 665167167967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15154156 + ... + 15197985.

It is an arithmetic number, because the mean of its divisors is an integer number (48138497212).

Almost surely, 2^665167170015 is an apocalyptic number.

665167170015 is a deficient number, since it is larger than the sum of its proper divisors (490156763073).

665167170015 is a wasteful number, since it uses less digits than its factorization.

665167170015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30352639 (or 30352636 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 45.

The spelling of 665167170015 in words is "six hundred sixty-five billion, one hundred sixty-seven million, one hundred seventy thousand, fifteen".