655511677 has 2 divisors, whose sum is σ = 655511678. Its totient is φ = 655511676.

The previous prime is 655511663. The next prime is 655511683. The reversal of 655511677 is 776115556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 636098841 + 19412836 = 25221^2 + 4406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655511677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655511617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327755838 + 327755839.

It is an arithmetic number, because the mean of its divisors is an integer number (327755839).

Almost surely, 2^655511677 is an apocalyptic number.

It is an amenable number.

655511677 is a deficient number, since it is larger than the sum of its proper divisors (1).

655511677 is an equidigital number, since it uses as much as digits as its factorization.

655511677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 220500, while the sum is 43.

The square root of 655511677 is about 25602.9622700187. The cubic root of 655511677 is about 868.6806430009.

The spelling of 655511677 in words is "six hundred fifty-five million, five hundred eleven thousand, six hundred seventy-seven".