97566411077 has 2 divisors, whose sum is σ = 97566411078. Its totient is φ = 97566411076.

The previous prime is 97566411053. The next prime is 97566411091. The reversal of 97566411077 is 77011466579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68693264836 + 28873146241 = 262094^2 + 169921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97566411077 is a prime.

It is a super-2 number, since 2×97566411077² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97566411037) 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, 48783205538 + 48783205539.

It is an arithmetic number, because the mean of its divisors is an integer number (48783205539).

Almost surely, 2^97566411077 is an apocalyptic number.

It is an amenable number.

97566411077 is a deficient number, since it is larger than the sum of its proper divisors (1).

97566411077 is an equidigital number, since it uses as much as digits as its factorization.

97566411077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2222640, while the sum is 53.

The spelling of 97566411077 in words is "ninety-seven billion, five hundred sixty-six million, four hundred eleven thousand, seventy-seven".