166172672 has 48 divisors (see below), whose sum is σ = 340540200. Its totient is φ = 81018880.

The previous prime is 166172627. The next prime is 166172711. The reversal of 166172672 is 276271661.

It is a super-2 number, since 2×166172672² = 55226713839239168, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 82979 + ... + 84957.

Almost surely, 2^166172672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166172672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170270100).

166172672 is an abundant number, since it is smaller than the sum of its proper divisors (174367528).

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

166172672 is an equidigital number, since it uses as much as digits as its factorization.

166172672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042 (or 2022 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The square root of 166172672 is about 12890.7979582336. The cubic root of 166172672 is about 549.7769585981.

The spelling of 166172672 in words is "one hundred sixty-six million, one hundred seventy-two thousand, six hundred seventy-two".