671161016663 has 2 divisors, whose sum is σ = 671161016664. Its totient is φ = 671161016662.

The previous prime is 671161016633. The next prime is 671161016671. The reversal of 671161016663 is 366610161176.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671161016663 - 2¹⁸ = 671160754519 is a prime.

It is a super-2 number, since 2×671161016663² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671161016623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335580508331 + 335580508332.

It is an arithmetic number, because the mean of its divisors is an integer number (335580508332).

Almost surely, 2^671161016663 is an apocalyptic number.

671161016663 is a deficient number, since it is larger than the sum of its proper divisors (1).

671161016663 is an equidigital number, since it uses as much as digits as its factorization.

671161016663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 671161016663 in words is "six hundred seventy-one billion, one hundred sixty-one million, sixteen thousand, six hundred sixty-three".