57066388369 has 2 divisors, whose sum is σ = 57066388370. Its totient is φ = 57066388368.

The previous prime is 57066388363. The next prime is 57066388399. The reversal of 57066388369 is 96388366075.

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., 33493392144 + 23572996225 = 183012^2 + 153535^2 .

It is a cyclic number.

It is not a de Polignac number, because 57066388369 - 2¹⁹ = 57065864081 is a prime.

It is a super-2 number, since 2×57066388369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57066388363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28533194184 + 28533194185.

It is an arithmetic number, because the mean of its divisors is an integer number (28533194185).

Almost surely, 2^57066388369 is an apocalyptic number.

It is an amenable number.

57066388369 is a deficient number, since it is larger than the sum of its proper divisors (1).

57066388369 is an equidigital number, since it uses as much as digits as its factorization.

57066388369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39191040, while the sum is 61.

The spelling of 57066388369 in words is "fifty-seven billion, sixty-six million, three hundred eighty-eight thousand, three hundred sixty-nine".