6662706564637 has 2 divisors, whose sum is σ = 6662706564638. Its totient is φ = 6662706564636.

The previous prime is 6662706564539. The next prime is 6662706564649. The reversal of 6662706564637 is 7364656072666.

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., 5722376838201 + 940329726436 = 2392149^2 + 969706^2 .

It is a cyclic number.

It is not a de Polignac number, because 6662706564637 - 2¹⁵ = 6662706531869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6662706564677) 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 as a sum of consecutive naturals, namely, 3331353282318 + 3331353282319.

It is an arithmetic number, because the mean of its divisors is an integer number (3331353282319).

Almost surely, 2^{6662706564637} is an apocalyptic number.

It is an amenable number.

6662706564637 is a deficient number, since it is larger than the sum of its proper divisors (1).

6662706564637 is an equidigital number, since it uses as much as digits as its factorization.

6662706564637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 274337280, while the sum is 64.

The spelling of 6662706564637 in words is "six trillion, six hundred sixty-two billion, seven hundred six million, five hundred sixty-four thousand, six hundred thirty-seven".