671815422407 has 2 divisors, whose sum is σ = 671815422408. Its totient is φ = 671815422406.

The previous prime is 671815422371. The next prime is 671815422457. The reversal of 671815422407 is 704224518176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671815422407 - 2²⁰ = 671814373831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671815422457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335907711203 + 335907711204.

It is an arithmetic number, because the mean of its divisors is an integer number (335907711204).

Almost surely, 2^671815422407 is an apocalyptic number.

671815422407 is a deficient number, since it is larger than the sum of its proper divisors (1).

671815422407 is an equidigital number, since it uses as much as digits as its factorization.

671815422407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 671815422407 in words is "six hundred seventy-one billion, eight hundred fifteen million, four hundred twenty-two thousand, four hundred seven".