12664664977 has 2 divisors, whose sum is σ = 12664664978. Its totient is φ = 12664664976.

The previous prime is 12664664963. The next prime is 12664665071. The reversal of 12664664977 is 77946646621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11662056081 + 1002608896 = 107991^2 + 31664^2 .

It is a cyclic number.

It is not a de Polignac number, because 12664664977 - 2³¹ = 10517181329 is a prime.

It is not a weakly prime, because it can be changed into another prime (12664668977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332332488 + 6332332489.

It is an arithmetic number, because the mean of its divisors is an integer number (6332332489).

Almost surely, 2^12664664977 is an apocalyptic number.

It is an amenable number.

12664664977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12664664977 is an equidigital number, since it uses as much as digits as its factorization.

12664664977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18289152, while the sum is 58.

The spelling of 12664664977 in words is "twelve billion, six hundred sixty-four million, six hundred sixty-four thousand, nine hundred seventy-seven".