668723552 has 24 divisors (see below), whose sum is σ = 1504628496. Its totient is φ = 286595712.

The previous prime is 668723527. The next prime is 668723593. The reversal of 668723552 is 255327866.

It is a super-3 number, since 3×668723552³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1492463 + ... + 1492910.

It is an arithmetic number, because the mean of its divisors is an integer number (62692854).

Almost surely, 2^668723552 is an apocalyptic number.

It is an amenable number.

668723552 is an abundant number, since it is smaller than the sum of its proper divisors (835904944).

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

668723552 is a wasteful number, since it uses less digits than its factorization.

668723552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2985390 (or 2985382 counting only the distinct ones).

The product of its digits is 604800, while the sum is 44.

The square root of 668723552 is about 25859.6897119822. The cubic root of 668723552 is about 874.4779697584.

The spelling of 668723552 in words is "six hundred sixty-eight million, seven hundred twenty-three thousand, five hundred fifty-two".