13331199977 has 2 divisors, whose sum is σ = 13331199978. Its totient is φ = 13331199976.

The previous prime is 13331199949. The next prime is 13331200013. The reversal of 13331199977 is 77999113331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13313467456 + 17732521 = 115384^2 + 4211^2 .

It is a cyclic number.

It is not a de Polignac number, because 13331199977 - 2¹⁰ = 13331198953 is a prime.

It is not a weakly prime, because it can be changed into another prime (13331199377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665599988 + 6665599989.

It is an arithmetic number, because the mean of its divisors is an integer number (6665599989).

Almost surely, 2^13331199977 is an apocalyptic number.

It is an amenable number.

13331199977 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331199977 is an equidigital number, since it uses as much as digits as its factorization.

13331199977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 964467, while the sum is 53.

The spelling of 13331199977 in words is "thirteen billion, three hundred thirty-one million, one hundred ninety-nine thousand, nine hundred seventy-seven".