665071120115 has 16 divisors (see below), whose sum is σ = 852929043552. Its totient is φ = 496079430144.

The previous prime is 665071120079. The next prime is 665071120139. The reversal of 665071120115 is 511021170566.

It is a cyclic number.

It is not a de Polignac number, because 665071120115 - 2²² = 665066925811 is a prime.

It is a super-2 number, since 2×665071120115² (a number of 24 digits) contains 22 as substring.

It is a Duffinian 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, 36553364 + ... + 36571553.

It is an arithmetic number, because the mean of its divisors is an integer number (53308065222).

Almost surely, 2^665071120115 is an apocalyptic number.

665071120115 is a deficient number, since it is larger than the sum of its proper divisors (187857923437).

665071120115 is a wasteful number, since it uses less digits than its factorization.

665071120115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73125046.

The product of its (nonzero) digits is 12600, while the sum is 35.

The spelling of 665071120115 in words is "six hundred sixty-five billion, seventy-one million, one hundred twenty thousand, one hundred fifteen".