115661660 has 24 divisors (see below), whose sum is σ = 243915840. Its totient is φ = 46069184.

The previous prime is 115661639. The next prime is 115661677. The reversal of 115661660 is 66166511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7319 + ... + 16878.

It is an arithmetic number, because the mean of its divisors is an integer number (10163160).

Almost surely, 2^115661660 is an apocalyptic number.

115661660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115661660 is an abundant number, since it is smaller than the sum of its proper divisors (128254180).

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

115661660 is a wasteful number, since it uses less digits than its factorization.

115661660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24445 (or 24443 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 115661660 is about 10754.6111040800. The cubic root of 115661660 is about 487.2252723393.

The spelling of 115661660 in words is "one hundred fifteen million, six hundred sixty-one thousand, six hundred sixty".