166331061 has 24 divisors (see below), whose sum is σ = 262394496. Its totient is φ = 100910880.

The previous prime is 166331059. The next prime is 166331069. The reversal of 166331061 is 160133661.

It is a happy number.

166331061 is a `hidden beast` number, since 16 + 633 + 10 + 6 + 1 = 666.

It is not a de Polignac number, because 166331061 - 2¹ = 166331059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166331069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1705 + ... + 18318.

It is an arithmetic number, because the mean of its divisors is an integer number (10933104).

Almost surely, 2^166331061 is an apocalyptic number.

It is an amenable number.

166331061 is a deficient number, since it is larger than the sum of its proper divisors (96063435).

166331061 is a wasteful number, since it uses less digits than its factorization.

166331061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20113 (or 20110 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 166331061 is about 12896.9399859036. The cubic root of 166331061 is about 549.9515781062.

The spelling of 166331061 in words is "one hundred sixty-six million, three hundred thirty-one thousand, sixty-one".