677743657 has 2 divisors, whose sum is σ = 677743658. Its totient is φ = 677743656.

The previous prime is 677743637. The next prime is 677743667. The reversal of 677743657 is 756347776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518882841 + 158860816 = 22779^2 + 12604^2 .

It is a cyclic number.

It is not a de Polignac number, because 677743657 - 2⁷ = 677743529 is a prime.

It is not a weakly prime, because it can be changed into another prime (677743637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338871828 + 338871829.

It is an arithmetic number, because the mean of its divisors is an integer number (338871829).

Almost surely, 2^677743657 is an apocalyptic number.

It is an amenable number.

677743657 is a deficient number, since it is larger than the sum of its proper divisors (1).

677743657 is an equidigital number, since it uses as much as digits as its factorization.

677743657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5186160, while the sum is 52.

The square root of 677743657 is about 26033.5102704188. The cubic root of 677743657 is about 878.3922335510.

The spelling of 677743657 in words is "six hundred seventy-seven million, seven hundred forty-three thousand, six hundred fifty-seven".