664712223255415 has 16 divisors (see below), whose sum is σ = 807799189017600. Its totient is φ = 525007558307232.

The previous prime is 664712223255383. The next prime is 664712223255433. The reversal of 664712223255415 is 514552322217466.

It is a cyclic number.

It is not a de Polignac number, because 664712223255415 - 2⁵ = 664712223255383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42902155 + ... + 56302924.

It is an arithmetic number, because the mean of its divisors is an integer number (50487449313600).

Almost surely, 2^{664712223255415} is an apocalyptic number.

664712223255415 is a deficient number, since it is larger than the sum of its proper divisors (143086965762185).

664712223255415 is a wasteful number, since it uses less digits than its factorization.

664712223255415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99222126.

The product of its digits is 24192000, while the sum is 55.

The spelling of 664712223255415 in words is "six hundred sixty-four trillion, seven hundred twelve billion, two hundred twenty-three million, two hundred fifty-five thousand, four hundred fifteen".