13666497855 has 8 divisors (see below), whose sum is σ = 21866396592. Its totient is φ = 7288798848.

The previous prime is 13666497769. The next prime is 13666497893. The reversal of 13666497855 is 55879466631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13666497855 - 2⁸ = 13666497599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455549914 + ... + 455549943.

It is an arithmetic number, because the mean of its divisors is an integer number (2733299574).

Almost surely, 2^13666497855 is an apocalyptic number.

13666497855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13666497855 is a deficient number, since it is larger than the sum of its proper divisors (8199898737).

13666497855 is an equidigital number, since it uses as much as digits as its factorization.

13666497855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911099865.

The product of its digits is 32659200, while the sum is 60.

The spelling of 13666497855 in words is "thirteen billion, six hundred sixty-six million, four hundred ninety-seven thousand, eight hundred fifty-five".