668440754 has 8 divisors (see below), whose sum is σ = 1002772848. Its totient is φ = 334183140.

The previous prime is 668440739. The next prime is 668440757. The reversal of 668440754 is 457044866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (668440757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19109 + ... + 41255.

It is an arithmetic number, because the mean of its divisors is an integer number (125346606).

Almost surely, 2^668440754 is an apocalyptic number.

668440754 is a deficient number, since it is larger than the sum of its proper divisors (334332094).

668440754 is a wasteful number, since it uses less digits than its factorization.

668440754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37240.

The product of its (nonzero) digits is 645120, while the sum is 44.

The square root of 668440754 is about 25854.2212027359. The cubic root of 668440754 is about 874.3546823956.

The spelling of 668440754 in words is "six hundred sixty-eight million, four hundred forty thousand, seven hundred fifty-four".