668241044386 has 8 divisors (see below), whose sum is σ = 1036925758620. Its totient is φ = 322599124848.

The previous prime is 668241044371. The next prime is 668241044437. The reversal of 668241044386 is 683440142866.

It can be written as a sum of positive squares in 2 ways, for example, as 655363107025 + 12877937361 = 809545^2 + 113481^2 .

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

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, 5760698601 + ... + 5760698716.

Almost surely, 2^668241044386 is an apocalyptic number.

668241044386 is a deficient number, since it is larger than the sum of its proper divisors (368684714234).

668241044386 is a wasteful number, since it uses less digits than its factorization.

668241044386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11521397348.

The product of its (nonzero) digits is 5308416, while the sum is 52.

The spelling of 668241044386 in words is "six hundred sixty-eight billion, two hundred forty-one million, forty-four thousand, three hundred eighty-six".