664712223257365 has 16 divisors (see below), whose sum is σ = 814631955927552. Its totient is φ = 520451750818944.

The previous prime is 664712223257321. The next prime is 664712223257393. The reversal of 664712223257365 is 563752322217466.

It is a cyclic number.

It is not a de Polignac number, because 664712223257365 - 2⁷ = 664712223257237 is a prime.

It is a super-2 number, since 2×664712223257365² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22406137 + ... + 42795553.

It is an arithmetic number, because the mean of its divisors is an integer number (50914497245472).

Almost surely, 2^{664712223257365} is an apocalyptic number.

It is an amenable number.

664712223257365 is a deficient number, since it is larger than the sum of its proper divisors (149919732670187).

664712223257365 is a wasteful number, since it uses less digits than its factorization.

664712223257365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20528196.

The product of its digits is 152409600, while the sum is 61.

The spelling of 664712223257365 in words is "six hundred sixty-four trillion, seven hundred twelve billion, two hundred twenty-three million, two hundred fifty-seven thousand, three hundred sixty-five".