666116115 has 32 divisors (see below), whose sum is σ = 1226136576. Its totient is φ = 302486400.

The previous prime is 666116093. The next prime is 666116119. The reversal of 666116115 is 511611666.

It is not a de Polignac number, because 666116115 - 2⁸ = 666115859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666116119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5152 + ... + 36861.

It is an arithmetic number, because the mean of its divisors is an integer number (38316768).

Almost surely, 2^666116115 is an apocalyptic number.

666116115 is a deficient number, since it is larger than the sum of its proper divisors (560020461).

666116115 is a wasteful number, since it uses less digits than its factorization.

666116115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42179.

The product of its digits is 6480, while the sum is 33.

The square root of 666116115 is about 25809.2253855090. The cubic root of 666116115 is about 873.3399229184.

The spelling of 666116115 in words is "six hundred sixty-six million, one hundred sixteen thousand, one hundred fifteen".