13166621460 has 72 divisors (see below), whose sum is σ = 40692342600. Its totient is φ = 3444849408.

The previous prime is 13166621437. The next prime is 13166621471. The reversal of 13166621460 is 6412666131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 271656324 + 12894965136 = 16482^2 + 113556^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 680535 + ... + 699614.

It is an arithmetic number, because the mean of its divisors is an integer number (565171425).

Almost surely, 2^13166621460 is an apocalyptic number.

13166621460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13166621460 is an abundant number, since it is smaller than the sum of its proper divisors (27525721140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13166621460 is a wasteful number, since it uses less digits than its factorization.

13166621460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380217 (or 1380212 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 13166621460 in words is "thirteen billion, one hundred sixty-six million, six hundred twenty-one thousand, four hundred sixty".