115621436666 has 16 divisors (see below), whose sum is σ = 174015580200. Its totient is φ = 57616455168.

The previous prime is 115621436663. The next prime is 115621436699. The reversal of 115621436666 is 666634126511.

It can be written as a sum of positive squares in 4 ways, for example, as 104358072025 + 11263364641 = 323045^2 + 106129^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 115621436666.

It is not an unprimeable number, because it can be changed into a prime (115621436663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1058750 + ... + 1162838.

Almost surely, 2^115621436666 is an apocalyptic number.

115621436666 is a deficient number, since it is larger than the sum of its proper divisors (58394143534).

115621436666 is a wasteful number, since it uses less digits than its factorization.

115621436666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105953.

The product of its digits is 933120, while the sum is 47.

The spelling of 115621436666 in words is "one hundred fifteen billion, six hundred twenty-one million, four hundred thirty-six thousand, six hundred sixty-six".