668204333619 has 8 divisors (see below), whose sum is σ = 890960670720. Its totient is φ = 445458776136.

The previous prime is 668204333611. The next prime is 668204333633. The reversal of 668204333619 is 916333402866.

It is a happy number.

668204333619 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 668204333619 - 2³ = 668204333611 is a prime.

It is a super-2 number, since 2×668204333619² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (668204333611) 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, 2549139 + ... + 2799020.

It is an arithmetic number, because the mean of its divisors is an integer number (111370083840).

Almost surely, 2^668204333619 is an apocalyptic number.

668204333619 is a deficient number, since it is larger than the sum of its proper divisors (222756337101).

668204333619 is a wasteful number, since it uses less digits than its factorization.

668204333619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5389809.

The product of its (nonzero) digits is 3359232, while the sum is 51.

The spelling of 668204333619 in words is "six hundred sixty-eight billion, two hundred four million, three hundred thirty-three thousand, six hundred nineteen".