668417700 has 72 divisors (see below), whose sum is σ = 1941035488. Its totient is φ = 177592320.

The previous prime is 668417693. The next prime is 668417719. The reversal of 668417700 is 7714866.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80964 + ... + 88836.

Almost surely, 2^668417700 is an apocalyptic number.

668417700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668417700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970517744).

668417700 is an abundant number, since it is smaller than the sum of its proper divisors (1272617788).

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

668417700 is a wasteful number, since it uses less digits than its factorization.

668417700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8173 (or 8166 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 668417700 is about 25853.7753529344. The cubic root of 668417700 is about 874.3446303431.

The spelling of 668417700 in words is "six hundred sixty-eight million, four hundred seventeen thousand, seven hundred".