57651666697 has 2 divisors, whose sum is σ = 57651666698. Its totient is φ = 57651666696.

The previous prime is 57651666691. The next prime is 57651666719. The reversal of 57651666697 is 79666615675.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39819803401 + 17831863296 = 199549^2 + 133536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57651666697 is a prime.

It is not a weakly prime, because it can be changed into another prime (57651666691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28825833348 + 28825833349.

It is an arithmetic number, because the mean of its divisors is an integer number (28825833349).

Almost surely, 2^57651666697 is an apocalyptic number.

It is an amenable number.

57651666697 is a deficient number, since it is larger than the sum of its proper divisors (1).

57651666697 is an equidigital number, since it uses as much as digits as its factorization.

57651666697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85730400, while the sum is 64.

The spelling of 57651666697 in words is "fifty-seven billion, six hundred fifty-one million, six hundred sixty-six thousand, six hundred ninety-seven".