166061615 has 16 divisors (see below), whose sum is σ = 210129120. Its totient is φ = 125637120.

The previous prime is 166061579. The next prime is 166061617. The reversal of 166061615 is 516160661.

It is not a de Polignac number, because 166061615 - 2⁸ = 166061359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166061617) 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 15 ways as a sum of consecutive naturals, for example, 71147 + ... + 73443.

It is an arithmetic number, because the mean of its divisors is an integer number (13133070).

Almost surely, 2^166061615 is an apocalyptic number.

166061615 is a deficient number, since it is larger than the sum of its proper divisors (44067505).

166061615 is a wasteful number, since it uses less digits than its factorization.

166061615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 166061615 is about 12886.4896306170. The cubic root of 166061615 is about 549.6544551286.

The spelling of 166061615 in words is "one hundred sixty-six million, sixty-one thousand, six hundred fifteen".