667322899 has 2 divisors, whose sum is σ = 667322900. Its totient is φ = 667322898.

The previous prime is 667322839. The next prime is 667322911. The reversal of 667322899 is 998223766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667322899 - 2⁹ = 667322387 is a prime.

It is not a weakly prime, because it can be changed into another prime (667322809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333661449 + 333661450.

It is an arithmetic number, because the mean of its divisors is an integer number (333661450).

Almost surely, 2^667322899 is an apocalyptic number.

667322899 is a deficient number, since it is larger than the sum of its proper divisors (1).

667322899 is an equidigital number, since it uses as much as digits as its factorization.

667322899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 52.

The square root of 667322899 is about 25832.5937334988. The cubic root of 667322899 is about 873.8670066112.

The spelling of 667322899 in words is "six hundred sixty-seven million, three hundred twenty-two thousand, eight hundred ninety-nine".