13166665020 has 120 divisors (see below), whose sum is σ = 41713787808. Its totient is φ = 3476304000.

The previous prime is 13166664961. The next prime is 13166665033. The reversal of 13166665020 is 2056666131.

13166665020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13166665020² (a number of 21 digits) contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 123385 + ... + 203855.

Almost surely, 2^13166665020 is an apocalyptic number.

13166665020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13166665020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20856893904).

13166665020 is an abundant number, since it is smaller than the sum of its proper divisors (28547122788).

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

13166665020 is a wasteful number, since it uses less digits than its factorization.

13166665020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80593 (or 80582 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 13166665020 in words is "thirteen billion, one hundred sixty-six million, six hundred sixty-five thousand, twenty".