668734813032245 has 8 divisors (see below), whose sum is σ = 807404976717216. Its totient is φ = 531705716373456.

The previous prime is 668734813032217. The next prime is 668734813032281. The reversal of 668734813032245 is 542230318437866.

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 668734813032245 - 2³² = 668730518064949 is a prime.

It is a super-2 number, since 2×668734813032245² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410266755647 + ... + 410266757276.

It is an arithmetic number, because the mean of its divisors is an integer number (100925622089652).

Almost surely, 2^{668734813032245} is an apocalyptic number.

It is an amenable number.

668734813032245 is a deficient number, since it is larger than the sum of its proper divisors (138670163684971).

668734813032245 is a wasteful number, since it uses less digits than its factorization.

668734813032245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820533513091.

The product of its (nonzero) digits is 139345920, while the sum is 62.

The spelling of 668734813032245 in words is "six hundred sixty-eight trillion, seven hundred thirty-four billion, eight hundred thirteen million, thirty-two thousand, two hundred forty-five".