12669983957 has 2 divisors, whose sum is σ = 12669983958. Its totient is φ = 12669983956.

The previous prime is 12669983951. The next prime is 12669983983. The reversal of 12669983957 is 75938996621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10165882276 + 2504101681 = 100826^2 + 50041^2 .

It is a cyclic number.

It is not a de Polignac number, because 12669983957 - 2¹⁶ = 12669918421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12669983893 and 12669983902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12669983951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6334991978 + 6334991979.

It is an arithmetic number, because the mean of its divisors is an integer number (6334991979).

Almost surely, 2^12669983957 is an apocalyptic number.

It is an amenable number.

12669983957 is a deficient number, since it is larger than the sum of its proper divisors (1).

12669983957 is an equidigital number, since it uses as much as digits as its factorization.

12669983957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44089920, while the sum is 65.

The spelling of 12669983957 in words is "twelve billion, six hundred sixty-nine million, nine hundred eighty-three thousand, nine hundred fifty-seven".