166151105665 has 32 divisors (see below), whose sum is σ = 213518361600. Its totient is φ = 123740809920.

The previous prime is 166151105657. The next prime is 166151105669. The reversal of 166151105665 is 566501151661.

It is not a de Polignac number, because 166151105665 - 2³ = 166151105657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166151105669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19674934 + ... + 19683376.

It is an arithmetic number, because the mean of its divisors is an integer number (6672448800).

Almost surely, 2^166151105665 is an apocalyptic number.

It is an amenable number.

166151105665 is a deficient number, since it is larger than the sum of its proper divisors (47367255935).

166151105665 is a wasteful number, since it uses less digits than its factorization.

166151105665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12037.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 166151105665 in words is "one hundred sixty-six billion, one hundred fifty-one million, one hundred five thousand, six hundred sixty-five".