166116115625540 has 48 divisors (see below), whose sum is σ = 354617452949760. Its totient is φ = 65355688419840.

The previous prime is 166116115625519. The next prime is 166116115625557. The reversal of 166116115625540 is 45526511611661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280248620 + ... + 280840739.

It is an arithmetic number, because the mean of its divisors is an integer number (7387863603120).

Almost surely, 2^{166116115625540} is an apocalyptic number.

166116115625540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166116115625540 is an abundant number, since it is smaller than the sum of its proper divisors (188501337324220).

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

166116115625540 is a wasteful number, since it uses less digits than its factorization.

166116115625540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561089612 (or 561089610 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 50.

The spelling of 166116115625540 in words is "one hundred sixty-six trillion, one hundred sixteen billion, one hundred fifteen million, six hundred twenty-five thousand, five hundred forty".