166326731 has 8 divisors (see below), whose sum is σ = 173944320. Its totient is φ = 158741352.

The previous prime is 166326701. The next prime is 166326733. The reversal of 166326731 is 137623661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166326731 - 2¹⁰ = 166325707 is a prime.

It is a super-2 number, since 2×166326731² = 55329162890292722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166326691 and 166326700.

It is not an unprimeable number, because it can be changed into a prime (166326733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2840 + ... + 18458.

It is an arithmetic number, because the mean of its divisors is an integer number (21743040).

Almost surely, 2^166326731 is an apocalyptic number.

166326731 is a deficient number, since it is larger than the sum of its proper divisors (7617589).

166326731 is a wasteful number, since it uses less digits than its factorization.

166326731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16105.

The product of its digits is 27216, while the sum is 35.

The square root of 166326731 is about 12896.7721155334. The cubic root of 166326731 is about 549.9468058747.

The spelling of 166326731 in words is "one hundred sixty-six million, three hundred twenty-six thousand, seven hundred thirty-one".