668147712 has 112 divisors (see below), whose sum is σ = 1841187072. Its totient is φ = 215285760.

The previous prime is 668147699. The next prime is 668147729. The reversal of 668147712 is 217741866.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761418 + ... + 762294.

Almost surely, 2^668147712 is an apocalyptic number.

668147712 is a gapful number since it is divisible by the number (62) 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 668147712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (920593536).

668147712 is an abundant number, since it is smaller than the sum of its proper divisors (1173039360).

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

668147712 is an equidigital number, since it uses as much as digits as its factorization.

668147712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 913 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 668147712 is about 25848.5533831199. The cubic root of 668147712 is about 874.2268924133.

The spelling of 668147712 in words is "six hundred sixty-eight million, one hundred forty-seven thousand, seven hundred twelve".