664476479 has 2 divisors, whose sum is σ = 664476480. Its totient is φ = 664476478.

The previous prime is 664476457. The next prime is 664476487. The reversal of 664476479 is 974674466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664476479 is a prime.

It is a super-2 number, since 2×664476479² = 883057982288474882, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664476479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664476179) 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, 332238239 + 332238240.

It is an arithmetic number, because the mean of its divisors is an integer number (332238240).

Almost surely, 2^664476479 is an apocalyptic number.

664476479 is a deficient number, since it is larger than the sum of its proper divisors (1).

664476479 is an equidigital number, since it uses as much as digits as its factorization.

664476479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 53.

The square root of 664476479 is about 25777.4412810892. The cubic root of 664476479 is about 872.6227626158.

The spelling of 664476479 in words is "six hundred sixty-four million, four hundred seventy-six thousand, four hundred seventy-nine".