668434361 has 8 divisors (see below), whose sum is σ = 767205504. Its totient is φ = 570483360.

The previous prime is 668434313. The next prime is 668434363. The reversal of 668434361 is 163434866.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668434361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668434363) 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, 203285 + ... + 206546.

It is an arithmetic number, because the mean of its divisors is an integer number (95900688).

Almost surely, 2^668434361 is an apocalyptic number.

It is an amenable number.

668434361 is a deficient number, since it is larger than the sum of its proper divisors (98771143).

668434361 is a wasteful number, since it uses less digits than its factorization.

668434361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410071.

The product of its digits is 248832, while the sum is 41.

The square root of 668434361 is about 25854.0975669235. The cubic root of 668434361 is about 874.3518949297.

The spelling of 668434361 in words is "six hundred sixty-eight million, four hundred thirty-four thousand, three hundred sixty-one".