666748068 has 48 divisors (see below), whose sum is σ = 1821369984. Its totient is φ = 185852160.

The previous prime is 666748051. The next prime is 666748087. The reversal of 666748068 is 860847666.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 666748068.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93355 + ... + 100242.

It is an arithmetic number, because the mean of its divisors is an integer number (37945208).

Almost surely, 2^666748068 is an apocalyptic number.

It is an amenable number.

666748068 is an abundant number, since it is smaller than the sum of its proper divisors (1154621916).

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

666748068 is a wasteful number, since it uses less digits than its factorization.

666748068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193652 (or 193650 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 51.

The square root of 666748068 is about 25821.4652566426. The cubic root of 666748068 is about 873.6160185966.

The spelling of 666748068 in words is "six hundred sixty-six million, seven hundred forty-eight thousand, sixty-eight".