6665544455737 has 2 divisors, whose sum is σ = 6665544455738. Its totient is φ = 6665544455736.

The previous prime is 6665544455659. The next prime is 6665544455771. The reversal of 6665544455737 is 7375544455666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5129880725776 + 1535663729961 = 2264924^2 + 1239219^2 .

It is a cyclic number.

It is not a de Polignac number, because 6665544455737 - 2²³ = 6665536067129 is a prime.

It is not a weakly prime, because it can be changed into another prime (6665544455137) 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, 3332772227868 + 3332772227869.

It is an arithmetic number, because the mean of its divisors is an integer number (3332772227869).

Almost surely, 2^{6665544455737} is an apocalyptic number.

It is an amenable number.

6665544455737 is a deficient number, since it is larger than the sum of its proper divisors (1).

6665544455737 is an equidigital number, since it uses as much as digits as its factorization.

6665544455737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080000, while the sum is 67.

The spelling of 6665544455737 in words is "six trillion, six hundred sixty-five billion, five hundred forty-four million, four hundred fifty-five thousand, seven hundred thirty-seven".