668706000 has 160 divisors (see below), whose sum is σ = 2193609600. Its totient is φ = 175206400.

The previous prime is 668705993. The next prime is 668706001. The reversal of 668706000 is 607866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668706001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 353056 + ... + 354944.

It is an arithmetic number, because the mean of its divisors is an integer number (13710060).

Almost surely, 2^668706000 is an apocalyptic number.

668706000 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 668706000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1096804800).

668706000 is an abundant number, since it is smaller than the sum of its proper divisors (1524903600).

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

668706000 is a wasteful number, since it uses less digits than its factorization.

668706000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974 (or 1958 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 668706000 is about 25859.3503398674. The cubic root of 668706000 is about 874.4703188781.

The spelling of 668706000 in words is "six hundred sixty-eight million, seven hundred six thousand".