668155468 has 6 divisors (see below), whose sum is σ = 1169272076. Its totient is φ = 334077732.

The previous prime is 668155459. The next prime is 668155469. The reversal of 668155468 is 864551866.

It is not an unprimeable number, because it can be changed into a prime (668155469) 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 as a sum of consecutive naturals, namely, 83519430 + ... + 83519437.

Almost surely, 2^668155468 is an apocalyptic number.

It is an amenable number.

668155468 is a deficient number, since it is larger than the sum of its proper divisors (501116608).

668155468 is a wasteful number, since it uses less digits than its factorization.

668155468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167038871 (or 167038869 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 49.

The square root of 668155468 is about 25848.7034104227. The cubic root of 668155468 is about 874.2302751371.

The spelling of 668155468 in words is "six hundred sixty-eight million, one hundred fifty-five thousand, four hundred sixty-eight".