668198696 has 16 divisors (see below), whose sum is σ = 1366770240. Its totient is φ = 303726640.

The previous prime is 668198693. The next prime is 668198717. The reversal of 668198696 is 696891866.

It is a super-3 number, since 3×668198696³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (668198693) by changing a digit.

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, 3796496 + ... + 3796671.

It is an arithmetic number, because the mean of its divisors is an integer number (85423140).

Almost surely, 2^668198696 is an apocalyptic number.

It is an amenable number.

668198696 is an abundant number, since it is smaller than the sum of its proper divisors (698571544).

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

668198696 is a wasteful number, since it uses less digits than its factorization.

668198696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7593184 (or 7593180 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 59.

The square root of 668198696 is about 25849.5395703676. The cubic root of 668198696 is about 874.2491282400.

The spelling of 668198696 in words is "six hundred sixty-eight million, one hundred ninety-eight thousand, six hundred ninety-six".