166168372 has 24 divisors (see below), whose sum is σ = 294746760. Its totient is φ = 81960960.

The previous prime is 166168351. The next prime is 166168393. The reversal of 166168372 is 273861661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (166168351) and next prime (166168393).

It can be written as a sum of positive squares in 4 ways, for example, as 376996 + 165791376 = 614^2 + 12876^2 .

It is a super-2 number, since 2×166168372² = 55223855706260768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178404 + ... + 179332.

It is an arithmetic number, because the mean of its divisors is an integer number (12281115).

Almost surely, 2^166168372 is an apocalyptic number.

It is an amenable number.

166168372 is a deficient number, since it is larger than the sum of its proper divisors (128578388).

166168372 is a wasteful number, since it uses less digits than its factorization.

166168372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491 (or 1489 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 166168372 is about 12890.6311715137. The cubic root of 166168372 is about 549.7722164198.

The spelling of 166168372 in words is "one hundred sixty-six million, one hundred sixty-eight thousand, three hundred seventy-two".