668754630 has 80 divisors (see below), whose sum is σ = 1856283264. Its totient is φ = 172575360.

The previous prime is 668754563. The next prime is 668754631. The reversal of 668754630 is 36457866.

668754630 is a `hidden beast` number, since 6 + 6 + 8 + 7 + 5 + 4 + 630 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668754631) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11794 + ... + 38426.

Almost surely, 2^668754630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668754630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928141632).

668754630 is an abundant number, since it is smaller than the sum of its proper divisors (1187528634).

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

668754630 is a wasteful number, since it uses less digits than its factorization.

668754630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26683 (or 26674 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 668754630 is about 25860.2906016154. The cubic root of 668754630 is about 874.4915162657.

The spelling of 668754630 in words is "six hundred sixty-eight million, seven hundred fifty-four thousand, six hundred thirty".