671633657351 has 2 divisors, whose sum is σ = 671633657352. Its totient is φ = 671633657350.

The previous prime is 671633657347. The next prime is 671633657363. The reversal of 671633657351 is 153756336176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671633657351 - 2² = 671633657347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 671633657293 and 671633657302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671633657551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335816828675 + 335816828676.

It is an arithmetic number, because the mean of its divisors is an integer number (335816828676).

Almost surely, 2^671633657351 is an apocalyptic number.

671633657351 is a deficient number, since it is larger than the sum of its proper divisors (1).

671633657351 is an equidigital number, since it uses as much as digits as its factorization.

671633657351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7144200, while the sum is 53.

The spelling of 671633657351 in words is "six hundred seventy-one billion, six hundred thirty-three million, six hundred fifty-seven thousand, three hundred fifty-one".