677031035170621 has 2 divisors, whose sum is σ = 677031035170622. Its totient is φ = 677031035170620.

The previous prime is 677031035170603. The next prime is 677031035170631. The reversal of 677031035170621 is 126071530130776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 645192258403225 + 31838776767396 = 25400635^2 + 5642586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677031035170621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677031035170631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338515517585310 + 338515517585311.

It is an arithmetic number, because the mean of its divisors is an integer number (338515517585311).

Almost surely, 2^{677031035170621} is an apocalyptic number.

It is an amenable number.

677031035170621 is a deficient number, since it is larger than the sum of its proper divisors (1).

677031035170621 is an equidigital number, since it uses as much as digits as its factorization.

677031035170621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1111320, while the sum is 49.

The spelling of 677031035170621 in words is "six hundred seventy-seven trillion, thirty-one billion, thirty-five million, one hundred seventy thousand, six hundred twenty-one".