166001031 has 24 divisors (see below), whose sum is σ = 275037984. Its totient is φ = 94510080.

The previous prime is 166001021. The next prime is 166001057. The reversal of 166001031 is 130100661.

166001031 is a `hidden beast` number, since 1 + 660 + 0 + 1 + 0 + 3 + 1 = 666.

It is not a de Polignac number, because 166001031 - 2¹⁰ = 166000007 is a prime.

It is a super-2 number, since 2×166001031² = 55112684586125922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166000995 and 166001013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166001021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13015 + ... + 22391.

It is an arithmetic number, because the mean of its divisors is an integer number (11459916).

Almost surely, 2^166001031 is an apocalyptic number.

166001031 is a deficient number, since it is larger than the sum of its proper divisors (109036953).

166001031 is a wasteful number, since it uses less digits than its factorization.

166001031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9671 (or 9668 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 166001031 is about 12884.1387372226. The cubic root of 166001031 is about 549.5876038056.

Adding to 166001031 its reverse (130100661), we get a palindrome (296101692).

The spelling of 166001031 in words is "one hundred sixty-six million, one thousand, thirty-one".