13340055665 has 32 divisors (see below), whose sum is σ = 16604209440. Its totient is φ = 10280908800.

The previous prime is 13340055647. The next prime is 13340055671. The reversal of 13340055665 is 56655004331.

It can be written as a sum of positive squares in 16 ways, for example, as 7862723584 + 5477332081 = 88672^2 + 74009^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13340055665 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9006725 + ... + 9008205.

It is an arithmetic number, because the mean of its divisors is an integer number (518881545).

Almost surely, 2^13340055665 is an apocalyptic number.

It is an amenable number.

13340055665 is a deficient number, since it is larger than the sum of its proper divisors (3264153775).

13340055665 is a wasteful number, since it uses less digits than its factorization.

13340055665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 13340055665 its reverse (56655004331), we get a palindrome (69995059996).

The spelling of 13340055665 in words is "thirteen billion, three hundred forty million, fifty-five thousand, six hundred sixty-five".