668570196 has 96 divisors (see below), whose sum is σ = 1826592768. Its totient is φ = 186376320.

The previous prime is 668570173. The next prime is 668570209. The reversal of 668570196 is 691075866.

668570196 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×668570196² = 893972213958956832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1170591 + ... + 1171161.

It is an arithmetic number, because the mean of its divisors is an integer number (19027008).

Almost surely, 2^668570196 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 668570196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (913296384).

668570196 is an abundant number, since it is smaller than the sum of its proper divisors (1158022572).

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

668570196 is a wasteful number, since it uses less digits than its factorization.

668570196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 668570196 is about 25856.7243865111. The cubic root of 668570196 is about 874.4111176709.

The spelling of 668570196 in words is "six hundred sixty-eight million, five hundred seventy thousand, one hundred ninety-six".