668338351 has 4 divisors (see below), whose sum is σ = 668390400. Its totient is φ = 668286304.

The previous prime is 668338313. The next prime is 668338367. The reversal of 668338351 is 153833866.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 668338351 - 2¹¹ = 668336303 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 668338298 and 668338307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668308351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8535 + ... + 37543.

It is an arithmetic number, because the mean of its divisors is an integer number (167097600).

Almost surely, 2^668338351 is an apocalyptic number.

668338351 is a deficient number, since it is larger than the sum of its proper divisors (52049).

668338351 is a wasteful number, since it uses less digits than its factorization.

668338351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52048.

The product of its digits is 311040, while the sum is 43.

The square root of 668338351 is about 25852.2407346056. The cubic root of 668338351 is about 874.3100306621.

The spelling of 668338351 in words is "six hundred sixty-eight million, three hundred thirty-eight thousand, three hundred fifty-one".