666115111500 has 96 divisors (see below), whose sum is σ = 1945847606976. Its totient is φ = 177070220800.

The previous prime is 666115111499. The next prime is 666115111507. The reversal of 666115111500 is 5111511666.

It is not an unprimeable number, because it can be changed into a prime (666115111507) 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, 224937 + ... + 1175936.

It is an arithmetic number, because the mean of its divisors is an integer number (20269245906).

Almost surely, 2^666115111500 is an apocalyptic number.

666115111500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666115111500 is an abundant number, since it is smaller than the sum of its proper divisors (1279732495476).

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

666115111500 is a wasteful number, since it uses less digits than its factorization.

666115111500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401212 (or 1401200 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 666115111500 in words is "six hundred sixty-six billion, one hundred fifteen million, one hundred eleven thousand, five hundred".