667073998651 has 2 divisors, whose sum is σ = 667073998652. Its totient is φ = 667073998650.

The previous prime is 667073998649. The next prime is 667073998673. The reversal of 667073998651 is 156899370766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667073998651 - 2¹ = 667073998649 is a prime.

Together with 667073998649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (667073908651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333536999325 + 333536999326.

It is an arithmetic number, because the mean of its divisors is an integer number (333536999326).

Almost surely, 2^667073998651 is an apocalyptic number.

667073998651 is a deficient number, since it is larger than the sum of its proper divisors (1).

667073998651 is an equidigital number, since it uses as much as digits as its factorization.

667073998651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102876480, while the sum is 67.

The spelling of 667073998651 in words is "six hundred sixty-seven billion, seventy-three million, nine hundred ninety-eight thousand, six hundred fifty-one".