671513663 has 2 divisors, whose sum is σ = 671513664. Its totient is φ = 671513662.

The previous prime is 671513659. The next prime is 671513683. The reversal of 671513663 is 366315176.

671513663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671513663 - 2² = 671513659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671513683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335756831 + 335756832.

It is an arithmetic number, because the mean of its divisors is an integer number (335756832).

Almost surely, 2^671513663 is an apocalyptic number.

671513663 is a deficient number, since it is larger than the sum of its proper divisors (1).

671513663 is an equidigital number, since it uses as much as digits as its factorization.

671513663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 38.

The square root of 671513663 is about 25913.5806672872. The cubic root of 671513663 is about 875.6924751774.

The spelling of 671513663 in words is "six hundred seventy-one million, five hundred thirteen thousand, six hundred sixty-three".