677682157 has 2 divisors, whose sum is σ = 677682158. Its totient is φ = 677682156.

The previous prime is 677682151. The next prime is 677682199. The reversal of 677682157 is 751286776.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 608559561 + 69122596 = 24669^2 + 8314^2 .

It is a cyclic number.

It is not a de Polignac number, because 677682157 - 2⁷ = 677682029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 677682157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677682151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338841078 + 338841079.

It is an arithmetic number, because the mean of its divisors is an integer number (338841079).

Almost surely, 2^677682157 is an apocalyptic number.

It is an amenable number.

677682157 is a deficient number, since it is larger than the sum of its proper divisors (1).

677682157 is an equidigital number, since it uses as much as digits as its factorization.

677682157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 49.

The square root of 677682157 is about 26032.3290736730. The cubic root of 677682157 is about 878.3656636447.

The spelling of 677682157 in words is "six hundred seventy-seven million, six hundred eighty-two thousand, one hundred fifty-seven".