664818087415 has 8 divisors (see below), whose sum is σ = 825291419040. Its totient is φ = 513514660512.

The previous prime is 664818087413. The next prime is 664818087449. The reversal of 664818087415 is 514780818466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664818087415 - 2¹ = 664818087413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 664818087415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664818087413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2292476019 + ... + 2292476308.

It is an arithmetic number, because the mean of its divisors is an integer number (103161427380).

Almost surely, 2^664818087415 is an apocalyptic number.

664818087415 is a deficient number, since it is larger than the sum of its proper divisors (160473331625).

664818087415 is a wasteful number, since it uses less digits than its factorization.

664818087415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4584952361.

The product of its (nonzero) digits is 10321920, while the sum is 58.

The spelling of 664818087415 in words is "six hundred sixty-four billion, eight hundred eighteen million, eighty-seven thousand, four hundred fifteen".