667339999 has 2 divisors, whose sum is σ = 667340000. Its totient is φ = 667339998.

The previous prime is 667339997. The next prime is 667340017. The reversal of 667339999 is 999933766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667339999 - 2¹ = 667339997 is a prime.

Together with 667339997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667339991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333669999 + 333670000.

It is an arithmetic number, because the mean of its divisors is an integer number (333670000).

Almost surely, 2^667339999 is an apocalyptic number.

667339999 is a deficient number, since it is larger than the sum of its proper divisors (1).

667339999 is an equidigital number, since it uses as much as digits as its factorization.

667339999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14880348, while the sum is 61.

The square root of 667339999 is about 25832.9247085962. The cubic root of 667339999 is about 873.8744707630.

The spelling of 667339999 in words is "six hundred sixty-seven million, three hundred thirty-nine thousand, nine hundred ninety-nine".