557156666993 has 2 divisors, whose sum is σ = 557156666994. Its totient is φ = 557156666992.

The previous prime is 557156666981. The next prime is 557156667017. The reversal of 557156666993 is 399666651755.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411834078049 + 145322588944 = 641743^2 + 381212^2 .

It is a cyclic number.

It is not a de Polignac number, because 557156666993 - 2²² = 557152472689 is a prime.

It is not a weakly prime, because it can be changed into another prime (557156666933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278578333496 + 278578333497.

It is an arithmetic number, because the mean of its divisors is an integer number (278578333497).

Almost surely, 2^557156666993 is an apocalyptic number.

It is an amenable number.

557156666993 is a deficient number, since it is larger than the sum of its proper divisors (1).

557156666993 is an equidigital number, since it uses as much as digits as its factorization.

557156666993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562000, while the sum is 68.

The spelling of 557156666993 in words is "five hundred fifty-seven billion, one hundred fifty-six million, six hundred sixty-six thousand, nine hundred ninety-three".