668066754 has 16 divisors (see below), whose sum is σ = 1358038080. Its totient is φ = 219038160.

The previous prime is 668066753. The next prime is 668066767. The reversal of 668066754 is 457660866.

It is not an unprimeable number, because it can be changed into a prime (668066753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 912294 + ... + 913025.

It is an arithmetic number, because the mean of its divisors is an integer number (84877380).

Almost surely, 2^668066754 is an apocalyptic number.

668066754 is an abundant number, since it is smaller than the sum of its proper divisors (689971326).

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

668066754 is a wasteful number, since it uses less digits than its factorization.

668066754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825385.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The square root of 668066754 is about 25846.9873292808. The cubic root of 668066754 is about 874.1915815989.

The spelling of 668066754 in words is "six hundred sixty-eight million, sixty-six thousand, seven hundred fifty-four".