668570324 has 6 divisors (see below), whose sum is σ = 1169998074. Its totient is φ = 334285160.

The previous prime is 668570317. The next prime is 668570369. The reversal of 668570324 is 423075866.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 483120400 + 185449924 = 21980^2 + 13618^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83571287 + ... + 83571294.

It is an arithmetic number, because the mean of its divisors is an integer number (194999679).

Almost surely, 2^668570324 is an apocalyptic number.

It is an amenable number.

668570324 is a deficient number, since it is larger than the sum of its proper divisors (501427750).

668570324 is a wasteful number, since it uses less digits than its factorization.

668570324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167142585 (or 167142583 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 668570324 is about 25856.7268616892. The cubic root of 668570324 is about 874.4111734739.

The spelling of 668570324 in words is "six hundred sixty-eight million, five hundred seventy thousand, three hundred twenty-four".