166145631656 has 32 divisors (see below), whose sum is σ = 312246360000. Its totient is φ = 82880069760.

The previous prime is 166145631653. The next prime is 166145631671. The reversal of 166145631656 is 656136541661.

It is not an unprimeable number, because it can be changed into a prime (166145631653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12541196 + ... + 12554436.

It is an arithmetic number, because the mean of its divisors is an integer number (9757698750).

Almost surely, 2^166145631656 is an apocalyptic number.

It is an amenable number.

166145631656 is a deficient number, since it is larger than the sum of its proper divisors (146100728344).

166145631656 is a wasteful number, since it uses less digits than its factorization.

166145631656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16769 (or 16765 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 50.

The spelling of 166145631656 in words is "one hundred sixty-six billion, one hundred forty-five million, six hundred thirty-one thousand, six hundred fifty-six".