166155511560101 has 12 divisors (see below), whose sum is σ = 193299880969440. Its totient is φ = 142406528576760.

The previous prime is 166155511560091. The next prime is 166155511560191. The reversal of 166155511560101 is 101065115551661.

It is not a de Polignac number, because 166155511560101 - 2⁶ = 166155511560037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166155511560191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148022441 + ... + 149140718.

It is an arithmetic number, because the mean of its divisors is an integer number (16108323414120).

Almost surely, 2^{166155511560101} is an apocalyptic number.

It is an amenable number.

166155511560101 is a deficient number, since it is larger than the sum of its proper divisors (27144369409339).

166155511560101 is a wasteful number, since it uses less digits than its factorization.

166155511560101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297174584 (or 297174577 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 44.

The spelling of 166155511560101 in words is "one hundred sixty-six trillion, one hundred fifty-five billion, five hundred eleven million, five hundred sixty thousand, one hundred one".