668342268 has 72 divisors (see below), whose sum is σ = 1902491136. Its totient is φ = 195991200.

The previous prime is 668342263. The next prime is 668342273. The reversal of 668342268 is 862243866.

It is an interprime number because it is at equal distance from previous prime (668342263) and next prime (668342273).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668342263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14946 + ... + 39497.

It is an arithmetic number, because the mean of its divisors is an integer number (26423488).

Almost surely, 2^668342268 is an apocalyptic number.

It is an amenable number.

668342268 is an abundant number, since it is smaller than the sum of its proper divisors (1234148868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668342268 is a wasteful number, since it uses less digits than its factorization.

668342268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54495 (or 54490 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 668342268 is about 25852.3164919510. The cubic root of 668342268 is about 874.3117387120.

The spelling of 668342268 in words is "six hundred sixty-eight million, three hundred forty-two thousand, two hundred sixty-eight".