667980896971 has 2 divisors, whose sum is σ = 667980896972. Its totient is φ = 667980896970.

The previous prime is 667980896951. The next prime is 667980896983. The reversal of 667980896971 is 179698089766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667980896971 - 2²¹ = 667978799819 is a prime.

It is not a weakly prime, because it can be changed into another prime (667980896941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333990448485 + 333990448486.

It is an arithmetic number, because the mean of its divisors is an integer number (333990448486).

Almost surely, 2^667980896971 is an apocalyptic number.

667980896971 is a deficient number, since it is larger than the sum of its proper divisors (1).

667980896971 is an equidigital number, since it uses as much as digits as its factorization.

667980896971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493807104, while the sum is 76.

The spelling of 667980896971 in words is "six hundred sixty-seven billion, nine hundred eighty million, eight hundred ninety-six thousand, nine hundred seventy-one".