166171648 has 22 divisors (see below), whose sum is σ = 332183066. Its totient is φ = 83085312.

The previous prime is 166171637. The next prime is 166171661. The reversal of 166171648 is 846171661.

It can be written as a sum of positive squares in only one way, i.e., 104203264 + 61968384 = 10208^2 + 7872^2 .

It is a super-2 number, since 2×166171648² = 55226033198071808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166171648.

It is a congruent number.

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, 80115 + ... + 82162.

Almost surely, 2^166171648 is an apocalyptic number.

It is an amenable number.

166171648 is a deficient number, since it is larger than the sum of its proper divisors (166011418).

166171648 is an equidigital number, since it uses as much as digits as its factorization.

166171648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162297 (or 162279 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 166171648 is about 12890.7582399175. The cubic root of 166171648 is about 549.7758293054.

The spelling of 166171648 in words is "one hundred sixty-six million, one hundred seventy-one thousand, six hundred forty-eight".