166436510650013 has 4 divisors (see below), whose sum is σ = 167356049383068. Its totient is φ = 165516971916960.

The previous prime is 166436510649991. The next prime is 166436510650043. The reversal of 166436510650013 is 310056015634661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68172549948889 + 98263960701124 = 8256667^2 + 9912818^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166436510650013 is a prime.

It is a super-2 number, since 2×166436510650013² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166436510650013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166436510650043) 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, 459769366256 + ... + 459769366617.

It is an arithmetic number, because the mean of its divisors is an integer number (41839012345767).

Almost surely, 2^{166436510650013} is an apocalyptic number.

It is an amenable number.

166436510650013 is a deficient number, since it is larger than the sum of its proper divisors (919538733055).

166436510650013 is an equidigital number, since it uses as much as digits as its factorization.

166436510650013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919538733054.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 166436510650013 in words is "one hundred sixty-six trillion, four hundred thirty-six billion, five hundred ten million, six hundred fifty thousand, thirteen".