668700 has 54 divisors (see below), whose sum is σ = 2098824. Its totient is φ = 178080.

The previous prime is 668699. The next prime is 668713. The reversal of 668700 is 7866.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 529 + ... + 1271.

2⁶⁶⁸⁷⁰⁰ is an apocalyptic number.

668700 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 668700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1049412).

668700 is an abundant number, since it is smaller than the sum of its proper divisors (1430124).

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

668700 is a wasteful number, since it uses less digits than its factorization.

668700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 668700 is about 817.7407902263. The cubic root of 668700 is about 87.4467703460.

The spelling of 668700 in words is "six hundred sixty-eight thousand, seven hundred".