6456866420737 has 2 divisors, whose sum is σ = 6456866420738. Its totient is φ = 6456866420736.

The previous prime is 6456866420689. The next prime is 6456866420747. The reversal of 6456866420737 is 7370246686546.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5808504887056 + 648361533681 = 2410084^2 + 805209^2 .

It is a cyclic number.

It is not a de Polignac number, because 6456866420737 - 2³⁵ = 6422506682369 is a prime.

It is a super-2 number, since 2×6456866420737² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6456866420747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3228433210368 + 3228433210369.

It is an arithmetic number, because the mean of its divisors is an integer number (3228433210369).

Almost surely, 2^{6456866420737} is an apocalyptic number.

It is an amenable number.

6456866420737 is a deficient number, since it is larger than the sum of its proper divisors (1).

6456866420737 is an equidigital number, since it uses as much as digits as its factorization.

6456866420737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243855360, while the sum is 64.

The spelling of 6456866420737 in words is "six trillion, four hundred fifty-six billion, eight hundred sixty-six million, four hundred twenty thousand, seven hundred thirty-seven".