668329488 has 80 divisors (see below), whose sum is σ = 1921652800. Its totient is φ = 222393600.

The previous prime is 668329451. The next prime is 668329513. The reversal of 668329488 is 884923866.

668329488 is a `hidden beast` number, since 66 + 83 + 29 + 488 = 666.

668329488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370188 + ... + 371988.

It is an arithmetic number, because the mean of its divisors is an integer number (24020660).

Almost surely, 2^668329488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668329488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960826400).

668329488 is an abundant number, since it is smaller than the sum of its proper divisors (1253323312).

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

668329488 is a wasteful number, since it uses less digits than its factorization.

668329488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677 (or 2665 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The square root of 668329488 is about 25852.0693175614. The cubic root of 668329488 is about 874.3061658312.

The spelling of 668329488 in words is "six hundred sixty-eight million, three hundred twenty-nine thousand, four hundred eighty-eight".