12997477677 has 4 divisors (see below), whose sum is σ = 17329970240. Its totient is φ = 8664985116.

The previous prime is 12997477673. The next prime is 12997477699. The reversal of 12997477677 is 77677479921.

It is a happy number.

12997477677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12997477677 - 2² = 12997477673 is a prime.

It is a super-2 number, since 2×12997477677² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12997477673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2166246277 + ... + 2166246282.

It is an arithmetic number, because the mean of its divisors is an integer number (4332492560).

Almost surely, 2^12997477677 is an apocalyptic number.

It is an amenable number.

12997477677 is a deficient number, since it is larger than the sum of its proper divisors (4332492563).

12997477677 is an equidigital number, since it uses as much as digits as its factorization.

12997477677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332492562.

The product of its digits is 65345616, while the sum is 66.

The spelling of 12997477677 in words is "twelve billion, nine hundred ninety-seven million, four hundred seventy-seven thousand, six hundred seventy-seven".