13166641633 has 4 divisors (see below), whose sum is σ = 13166921620. Its totient is φ = 13166361648.

The previous prime is 13166641619. The next prime is 13166641637. The reversal of 13166641633 is 33614666131.

It is a happy number.

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 9188564449 + 3978077184 = 95857^2 + 63072^2 .

It is a cyclic number.

It is not a de Polignac number, because 13166641633 - 2²⁹ = 12629770721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13166641637) 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 3 ways as a sum of consecutive naturals, for example, 50298 + ... + 169891.

It is an arithmetic number, because the mean of its divisors is an integer number (3291730405).

Almost surely, 2^13166641633 is an apocalyptic number.

It is an amenable number.

13166641633 is a deficient number, since it is larger than the sum of its proper divisors (279987).

13166641633 is an equidigital number, since it uses as much as digits as its factorization.

13166641633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279986.

The product of its digits is 139968, while the sum is 40.

The spelling of 13166641633 in words is "thirteen billion, one hundred sixty-six million, six hundred forty-one thousand, six hundred thirty-three".