671517677 has 2 divisors, whose sum is σ = 671517678. Its totient is φ = 671517676.

The previous prime is 671517673. The next prime is 671517689. The reversal of 671517677 is 776715176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541306756 + 130210921 = 23266^2 + 11411^2 .

It is a cyclic number.

It is not a de Polignac number, because 671517677 - 2² = 671517673 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671517673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335758838 + 335758839.

It is an arithmetic number, because the mean of its divisors is an integer number (335758839).

Almost surely, 2^671517677 is an apocalyptic number.

It is an amenable number.

671517677 is a deficient number, since it is larger than the sum of its proper divisors (1).

671517677 is an equidigital number, since it uses as much as digits as its factorization.

671517677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432180, while the sum is 47.

The square root of 671517677 is about 25913.6581169082. The cubic root of 671517677 is about 875.6942200029.

The spelling of 671517677 in words is "six hundred seventy-one million, five hundred seventeen thousand, six hundred seventy-seven".