166550013 has 48 divisors (see below), whose sum is σ = 287239680. Its totient is φ = 94466736.

The previous prime is 166549993. The next prime is 166550023. The reversal of 166550013 is 310055661.

It is a happy number.

166550013 is a `hidden beast` number, since 1 + 6 + 655 + 0 + 0 + 1 + 3 = 666.

It is not a de Polignac number, because 166550013 - 2⁹ = 166549501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166550023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 304206 + ... + 304752.

It is an arithmetic number, because the mean of its divisors is an integer number (5984160).

Almost surely, 2^166550013 is an apocalyptic number.

It is an amenable number.

166550013 is a deficient number, since it is larger than the sum of its proper divisors (120689667).

166550013 is an equidigital number, since it uses as much as digits as its factorization.

166550013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748 (or 736 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 166550013 is about 12905.4257194406. The cubic root of 166550013 is about 550.1927842086.

The spelling of 166550013 in words is "one hundred sixty-six million, five hundred fifty thousand, thirteen".