668383254 has 192 divisors, whose sum is σ = 2013672960. Its totient is φ = 154690560.

The previous prime is 668383231. The next prime is 668383267. The reversal of 668383254 is 452383866.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 446932 + ... + 448424.

It is an arithmetic number, because the mean of its divisors is an integer number (10487880).

Almost surely, 2^668383254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668383254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1006836480).

668383254 is an abundant number, since it is smaller than the sum of its proper divisors (1345289706).

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

668383254 is a wasteful number, since it uses less digits than its factorization.

668383254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555 (or 1552 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 668383254 is about 25853.1091747202. The cubic root of 668383254 is about 874.3296106967.

The spelling of 668383254 in words is "six hundred sixty-eight million, three hundred eighty-three thousand, two hundred fifty-four".