166516010501555 has 64 divisors (see below), whose sum is σ = 235042318909440. Its totient is φ = 111649087065600.

The previous prime is 166516010501507. The next prime is 166516010501557. The reversal of 166516010501555 is 555105010615661.

It is not a de Polignac number, because 166516010501555 - 2¹⁰ = 166516010500531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166516010501557) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3097426766 + ... + 3097480524.

It is an arithmetic number, because the mean of its divisors is an integer number (3672536232960).

Almost surely, 2^{166516010501555} is an apocalyptic number.

166516010501555 is a deficient number, since it is larger than the sum of its proper divisors (68526308407885).

166516010501555 is a wasteful number, since it uses less digits than its factorization.

166516010501555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59052.

The product of its (nonzero) digits is 675000, while the sum is 47.

The spelling of 166516010501555 in words is "one hundred sixty-six trillion, five hundred sixteen billion, ten million, five hundred one thousand, five hundred fifty-five".