155116505100666 has 64 divisors (see below), whose sum is σ = 325167469977600. Its totient is φ = 49236625971456.

The previous prime is 155116505100637. The next prime is 155116505100673. The reversal of 155116505100666 is 666001505611551.

155116505100666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×155116505100666² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116722210 + ... + 118043666.

It is an arithmetic number, because the mean of its divisors is an integer number (5080741718400).

Almost surely, 2^{155116505100666} is an apocalyptic number.

155116505100666 is an abundant number, since it is smaller than the sum of its proper divisors (170050964876934).

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

155116505100666 is a wasteful number, since it uses less digits than its factorization.

155116505100666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325283.

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 155116505100666 in words is "one hundred fifty-five trillion, one hundred sixteen billion, five hundred five million, one hundred thousand, six hundred sixty-six".