12455566677 has 12 divisors (see below), whose sum is σ = 17992727584. Its totient is φ = 8303086440.

The previous prime is 12455566639. The next prime is 12455566691. The reversal of 12455566677 is 77666555421.

It is a happy number.

It is not a de Polignac number, because 12455566677 - 2⁷ = 12455566549 is a prime.

It is a super-2 number, since 2×12455566677² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12455562677) 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 11 ways as a sum of consecutive naturals, for example, 96552 + ... + 185022.

Almost surely, 2^12455566677 is an apocalyptic number.

It is an amenable number.

12455566677 is a deficient number, since it is larger than the sum of its proper divisors (5537160907).

12455566677 is a wasteful number, since it uses less digits than its factorization.

12455566677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104120 (or 104117 counting only the distinct ones).

The product of its digits is 10584000, while the sum is 54.

The spelling of 12455566677 in words is "twelve billion, four hundred fifty-five million, five hundred sixty-six thousand, six hundred seventy-seven".