667579903 has 2 divisors, whose sum is σ = 667579904. Its totient is φ = 667579902.

The previous prime is 667579901. The next prime is 667579907. The reversal of 667579903 is 309975766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667579903 - 2¹ = 667579901 is a prime.

Together with 667579901, 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 (667579901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333789951 + 333789952.

It is an arithmetic number, because the mean of its divisors is an integer number (333789952).

Almost surely, 2^667579903 is an apocalyptic number.

667579903 is a deficient number, since it is larger than the sum of its proper divisors (1).

667579903 is an equidigital number, since it uses as much as digits as its factorization.

667579903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2143260, while the sum is 52.

The square root of 667579903 is about 25837.5676680294. The cubic root of 667579903 is about 873.9791754434.

The spelling of 667579903 in words is "six hundred sixty-seven million, five hundred seventy-nine thousand, nine hundred three".