166317056 has 22 divisors (see below), whose sum is σ = 332473740. Its totient is φ = 83158016.

The previous prime is 166317037. The next prime is 166317061. The reversal of 166317056 is 650713661.

It is a happy number.

It is a super-2 number, since 2×166317056² = 55322726233014272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80186 + ... + 82233.

Almost surely, 2^166317056 is an apocalyptic number.

166317056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166317056 is a deficient number, since it is larger than the sum of its proper divisors (166156684).

166317056 is an equidigital number, since it uses as much as digits as its factorization.

166317056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162439 (or 162421 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 166317056 is about 12896.3970162212. The cubic root of 166317056 is about 549.9361424484.

The spelling of 166317056 in words is "one hundred sixty-six million, three hundred seventeen thousand, fifty-six".