166655972 has 24 divisors (see below), whose sum is σ = 334002816. Its totient is φ = 71275968.

The previous prime is 166655963. The next prime is 166656023. The reversal of 166655972 is 279556661.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8168 + ... + 20000.

It is an arithmetic number, because the mean of its divisors is an integer number (13916784).

Almost surely, 2^166655972 is an apocalyptic number.

It is an amenable number.

166655972 is an abundant number, since it is smaller than the sum of its proper divisors (167346844).

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

166655972 is a wasteful number, since it uses less digits than its factorization.

166655972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12347 (or 12345 counting only the distinct ones).

The product of its digits is 680400, while the sum is 47.

The square root of 166655972 is about 12909.5302780543. The cubic root of 166655972 is about 550.3094368936.

The spelling of 166655972 in words is "one hundred sixty-six million, six hundred fifty-five thousand, nine hundred seventy-two".