166536013 has 4 divisors (see below), whose sum is σ = 190326880. Its totient is φ = 142745148.

The previous prime is 166535953. The next prime is 166536037. The reversal of 166536013 is 310635661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310635661 = 7 ⋅44376523.

It is not a de Polignac number, because 166536013 - 2²¹ = 164438861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166536113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11895423 + ... + 11895436.

It is an arithmetic number, because the mean of its divisors is an integer number (47581720).

Almost surely, 2^166536013 is an apocalyptic number.

It is an amenable number.

166536013 is a deficient number, since it is larger than the sum of its proper divisors (23790867).

166536013 is an equidigital number, since it uses as much as digits as its factorization.

166536013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23790866.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 166536013 is about 12904.8833005185. The cubic root of 166536013 is about 550.1773675886.

The spelling of 166536013 in words is "one hundred sixty-six million, five hundred thirty-six thousand, thirteen".