321760668 has 48 divisors (see below), whose sum is σ = 805230720. Its totient is φ = 99687744.

The previous prime is 321760657. The next prime is 321760669. The reversal of 321760668 is 866067123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321760669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1230 + ... + 25397.

It is an arithmetic number, because the mean of its divisors is an integer number (16775640).

Almost surely, 2^321760668 is an apocalyptic number.

321760668 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321760668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402615360).

321760668 is an abundant number, since it is smaller than the sum of its proper divisors (483470052).

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

321760668 is a wasteful number, since it uses less digits than its factorization.

321760668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26706 (or 26704 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 321760668 is about 17937.6884798460. The cubic root of 321760668 is about 685.2425432687.

The spelling of 321760668 in words is "three hundred twenty-one million, seven hundred sixty thousand, six hundred sixty-eight".