664842242248466 has 8 divisors (see below), whose sum is σ = 997265115241164. Its totient is φ = 332420537168080.

The previous prime is 664842242248447. The next prime is 664842242248517.

It is a happy number.

664842242248466 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 664364801325625 + 477440922841 = 25775275^2 + 690971^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 664842242248396 and 664842242248405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290553545 + ... + 292832796.

Almost surely, 2^{664842242248466} is an apocalyptic number.

664842242248466 is a deficient number, since it is larger than the sum of its proper divisors (332422872992698).

664842242248466 is a wasteful number, since it uses less digits than its factorization.

664842242248466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583956156.

The product of its digits is 1358954496, while the sum is 68.

The spelling of 664842242248466 in words is "six hundred sixty-four trillion, eight hundred forty-two billion, two hundred forty-two million, two hundred forty-eight thousand, four hundred sixty-six".