13388837825666 has 16 divisors (see below), whose sum is σ = 20798588384640. Its totient is φ = 6456481820880.

The previous prime is 13388837825651. The next prime is 13388837825677. The reversal of 13388837825666 is 66652873888331.

It is a junction number, because it is equal to n+sod(n) for n = 13388837825593 and 13388837825602.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 126644216 + ... + 126749891.

It is an arithmetic number, because the mean of its divisors is an integer number (1299911774040).

Almost surely, 2^{13388837825666} is an apocalyptic number.

13388837825666 is a deficient number, since it is larger than the sum of its proper divisors (7409750558974).

13388837825666 is a wasteful number, since it uses less digits than its factorization.

13388837825666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253395049.

The product of its digits is 1672151040, while the sum is 74.

The spelling of 13388837825666 in words is "thirteen trillion, three hundred eighty-eight billion, eight hundred thirty-seven million, eight hundred twenty-five thousand, six hundred sixty-six".