668170328 has 16 divisors (see below), whose sum is σ = 1431793680. Its totient is φ = 286358688.

The previous prime is 668170313. The next prime is 668170333. The reversal of 668170328 is 823071866.

668170328 = 9767² + 9768² + ... + 9773².

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 3 ways as a sum of consecutive naturals, for example, 5965751 + ... + 5965862.

It is an arithmetic number, because the mean of its divisors is an integer number (89487105).

Almost surely, 2^668170328 is an apocalyptic number.

It is an amenable number.

668170328 is an abundant number, since it is smaller than the sum of its proper divisors (763623352).

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

668170328 is a wasteful number, since it uses less digits than its factorization.

668170328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11931626 (or 11931622 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 668170328 is about 25848.9908507083. The cubic root of 668170328 is about 874.2367561465.

It can be divided in two parts, 6681703 and 28, that multiplied together give a square (187087684 = 13678²).

The spelling of 668170328 in words is "six hundred sixty-eight million, one hundred seventy thousand, three hundred twenty-eight".