668066674 has 16 divisors (see below), whose sum is σ = 1093599936. Its totient is φ = 303555600.

The previous prime is 668066653. The next prime is 668066677. The reversal of 668066674 is 476660866.

It is not an unprimeable number, because it can be changed into a prime (668066677) 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 7 ways as a sum of consecutive naturals, for example, 103819 + ... + 110065.

It is an arithmetic number, because the mean of its divisors is an integer number (68349996).

Almost surely, 2^668066674 is an apocalyptic number.

668066674 is a deficient number, since it is larger than the sum of its proper divisors (425533262).

668066674 is a wasteful number, since it uses less digits than its factorization.

668066674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11121.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The square root of 668066674 is about 25846.9857817116. The cubic root of 668066674 is about 874.1915467045.

The spelling of 668066674 in words is "six hundred sixty-eight million, sixty-six thousand, six hundred seventy-four".