664561001479 has 2 divisors, whose sum is σ = 664561001480. Its totient is φ = 664561001478.

The previous prime is 664561001453. The next prime is 664561001537. The reversal of 664561001479 is 974100165466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664561001479 - 2⁹ = 664561000967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664561004479) 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, 332280500739 + 332280500740.

It is an arithmetic number, because the mean of its divisors is an integer number (332280500740).

Almost surely, 2^664561001479 is an apocalyptic number.

664561001479 is a deficient number, since it is larger than the sum of its proper divisors (1).

664561001479 is an equidigital number, since it uses as much as digits as its factorization.

664561001479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 664561001479 in words is "six hundred sixty-four billion, five hundred sixty-one million, one thousand, four hundred seventy-nine".