166123656 has 32 divisors (see below), whose sum is σ = 461455200. Its totient is φ = 55374480.

The previous prime is 166123561. The next prime is 166123667. The reversal of 166123656 is 656321661.

166123656 is a `hidden beast` number, since 1 + 6 + 612 + 36 + 5 + 6 = 666.

166123656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 166123656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384330 + ... + 384761.

It is an arithmetic number, because the mean of its divisors is an integer number (14420475).

Almost surely, 2^166123656 is an apocalyptic number.

It is an amenable number.

166123656 is an abundant number, since it is smaller than the sum of its proper divisors (295331544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166123656 is a wasteful number, since it uses less digits than its factorization.

166123656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769106 (or 769096 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 166123656 is about 12888.8966168559. The cubic root of 166123656 is about 549.7228973273.

The spelling of 166123656 in words is "one hundred sixty-six million, one hundred twenty-three thousand, six hundred fifty-six".