166003731 has 12 divisors (see below), whose sum is σ = 241394400. Its totient is φ = 109925520.

The previous prime is 166003699. The next prime is 166003777. The reversal of 166003731 is 137300661.

It is not a de Polignac number, because 166003731 - 2⁵ = 166003699 is a prime.

It is a super-2 number, since 2×166003731² = 55114477411840722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166003695 and 166003704.

It is not an unprimeable number, because it can be changed into a prime (166003031) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 60555 + ... + 63236.

It is an arithmetic number, because the mean of its divisors is an integer number (20116200).

Almost surely, 2^166003731 is an apocalyptic number.

166003731 is a deficient number, since it is larger than the sum of its proper divisors (75390669).

166003731 is a wasteful number, since it uses less digits than its factorization.

166003731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123946 (or 123943 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 166003731 is about 12884.2435167921. The cubic root of 166003731 is about 549.5905834628.

The spelling of 166003731 in words is "one hundred sixty-six million, three thousand, seven hundred thirty-one".