655663760669 has 2 divisors, whose sum is σ = 655663760670. Its totient is φ = 655663760668.

The previous prime is 655663760627. The next prime is 655663760671. The reversal of 655663760669 is 966067366556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425805841444 + 229857919225 = 652538^2 + 479435^2 .

It is a cyclic number.

It is not a de Polignac number, because 655663760669 - 2³² = 651368793373 is a prime.

It is a super-2 number, since 2×655663760669² (a number of 24 digits) contains 22 as substring.

Together with 655663760671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655663762669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327831880334 + 327831880335.

It is an arithmetic number, because the mean of its divisors is an integer number (327831880335).

Almost surely, 2^655663760669 is an apocalyptic number.

It is an amenable number.

655663760669 is a deficient number, since it is larger than the sum of its proper divisors (1).

655663760669 is an equidigital number, since it uses as much as digits as its factorization.

655663760669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 220449600, while the sum is 65.

The spelling of 655663760669 in words is "six hundred fifty-five billion, six hundred sixty-three million, seven hundred sixty thousand, six hundred sixty-nine".