664581416351 has 2 divisors, whose sum is σ = 664581416352. Its totient is φ = 664581416350.

The previous prime is 664581416333. The next prime is 664581416363. The reversal of 664581416351 is 153614185466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664581416351 - 2⁶ = 664581416287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664581416351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664581416951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332290708175 + 332290708176.

It is an arithmetic number, because the mean of its divisors is an integer number (332290708176).

Almost surely, 2^664581416351 is an apocalyptic number.

664581416351 is a deficient number, since it is larger than the sum of its proper divisors (1).

664581416351 is an equidigital number, since it uses as much as digits as its factorization.

664581416351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2073600, while the sum is 50.

The spelling of 664581416351 in words is "six hundred sixty-four billion, five hundred eighty-one million, four hundred sixteen thousand, three hundred fifty-one".