13266646887 has 16 divisors (see below), whose sum is σ = 20052152960. Its totient is φ = 7734400992.

The previous prime is 13266646871. The next prime is 13266646903. The reversal of 13266646887 is 78864666231.

It is an interprime number because it is at equal distance from previous prime (13266646871) and next prime (13266646903).

It is not a de Polignac number, because 13266646887 - 2⁴ = 13266646871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13266646837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8951113 + ... + 8952594.

It is an arithmetic number, because the mean of its divisors is an integer number (1253259560).

Almost surely, 2^13266646887 is an apocalyptic number.

13266646887 is a deficient number, since it is larger than the sum of its proper divisors (6785506073).

13266646887 is a wasteful number, since it uses less digits than its factorization.

13266646887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17903742.

The product of its digits is 13934592, while the sum is 57.

The spelling of 13266646887 in words is "thirteen billion, two hundred sixty-six million, six hundred forty-six thousand, eight hundred eighty-seven".