671038056621 has 12 divisors (see below), whose sum is σ = 969381058048. Its totient is φ = 447310766664.

The previous prime is 671038056589. The next prime is 671038056631. The reversal of 671038056621 is 126650830176.

671038056621 is a `hidden beast` number, since 6 + 7 + 1 + 0 + 3 + 80 + 566 + 2 + 1 = 666.

It is not a de Polignac number, because 671038056621 - 2⁵ = 671038056589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671038056631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3906055 + ... + 4074228.

Almost surely, 2^671038056621 is an apocalyptic number.

It is an amenable number.

671038056621 is a deficient number, since it is larger than the sum of its proper divisors (298343001427).

671038056621 is a wasteful number, since it uses less digits than its factorization.

671038056621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7989632 (or 7989629 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

Adding to 671038056621 its reverse (126650830176), we get a palindrome (797688886797).

The spelling of 671038056621 in words is "six hundred seventy-one billion, thirty-eight million, fifty-six thousand, six hundred twenty-one".