166425623564 has 12 divisors (see below), whose sum is σ = 291310929000. Its totient is φ = 83193929568.

The previous prime is 166425623549. The next prime is 166425623569. The reversal of 166425623564 is 465326524661.

It is not an unprimeable number, because it can be changed into a prime (166425623569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4700714 + ... + 4735985.

It is an arithmetic number, because the mean of its divisors is an integer number (24275910750).

Almost surely, 2^166425623564 is an apocalyptic number.

It is an amenable number.

166425623564 is a deficient number, since it is larger than the sum of its proper divisors (124885305436).

166425623564 is a wasteful number, since it uses less digits than its factorization.

166425623564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9441112 (or 9441110 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 50.

The spelling of 166425623564 in words is "one hundred sixty-six billion, four hundred twenty-five million, six hundred twenty-three thousand, five hundred sixty-four".