668823462 has 96 divisors (see below), whose sum is σ = 1556755200. Its totient is φ = 207135936.

The previous prime is 668823461. The next prime is 668823473. The reversal of 668823462 is 264328866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668823461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1862839 + ... + 1863197.

It is an arithmetic number, because the mean of its divisors is an integer number (16216200).

Almost surely, 2^668823462 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668823462, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (778377600).

668823462 is an abundant number, since it is smaller than the sum of its proper divisors (887931738).

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

668823462 is a wasteful number, since it uses less digits than its factorization.

668823462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 519 counting only the distinct ones).

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

The square root of 668823462 is about 25861.6214108861. The cubic root of 668823462 is about 874.5215177701.

The spelling of 668823462 in words is "six hundred sixty-eight million, eight hundred twenty-three thousand, four hundred sixty-two".