677555069 has 2 divisors, whose sum is σ = 677555070. Its totient is φ = 677555068.

The previous prime is 677555041. The next prime is 677555071. The reversal of 677555069 is 960555776.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 676260025 + 1295044 = 26005^2 + 1138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677555069 is a prime.

It is a super-2 number, since 2×677555069² = 918161743055189522, which contains 22 as substring.

Together with 677555071, 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 (677555089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338777534 + 338777535.

It is an arithmetic number, because the mean of its divisors is an integer number (338777535).

Almost surely, 2^677555069 is an apocalyptic number.

It is an amenable number.

677555069 is a deficient number, since it is larger than the sum of its proper divisors (1).

677555069 is an equidigital number, since it uses as much as digits as its factorization.

677555069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1984500, while the sum is 50.

The square root of 677555069 is about 26029.8879943806. The cubic root of 677555069 is about 878.3107525957.

The spelling of 677555069 in words is "six hundred seventy-seven million, five hundred fifty-five thousand, sixty-nine".