697665866699 has 2 divisors, whose sum is σ = 697665866700. Its totient is φ = 697665866698.

The previous prime is 697665866617. The next prime is 697665866767. The reversal of 697665866699 is 996668566796.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 697665866699 - 2²⁴ = 697649089483 is a prime.

It is not a weakly prime, because it can be changed into another prime (697665869699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348832933349 + 348832933350.

It is an arithmetic number, because the mean of its divisors is an integer number (348832933350).

Almost surely, 2^697665866699 is an apocalyptic number.

697665866699 is a deficient number, since it is larger than the sum of its proper divisors (1).

697665866699 is an equidigital number, since it uses as much as digits as its factorization.

697665866699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9523422720, while the sum is 83.

The spelling of 697665866699 in words is "six hundred ninety-seven billion, six hundred sixty-five million, eight hundred sixty-six thousand, six hundred ninety-nine".