166633131 has 16 divisors (see below), whose sum is σ = 254112768. Its totient is φ = 95145600.

The previous prime is 166633123. The next prime is 166633139. The reversal of 166633131 is 131336661.

It is an interprime number because it is at equal distance from previous prime (166633123) and next prime (166633139).

It is not a de Polignac number, because 166633131 - 2³ = 166633123 is a prime.

It is a super-2 number, since 2×166633131² = 55533200693726322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166633139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37171 + ... + 41411.

It is an arithmetic number, because the mean of its divisors is an integer number (15882048).

Almost surely, 2^166633131 is an apocalyptic number.

166633131 is a deficient number, since it is larger than the sum of its proper divisors (87479637).

166633131 is a wasteful number, since it uses less digits than its factorization.

166633131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6122.

The product of its digits is 5832, while the sum is 30.

The square root of 166633131 is about 12908.6455912307. The cubic root of 166633131 is about 550.2842948960.

Adding to 166633131 its reverse (131336661), we get a palindrome (297969792).

The spelling of 166633131 in words is "one hundred sixty-six million, six hundred thirty-three thousand, one hundred thirty-one".