668182454 has 16 divisors (see below), whose sum is σ = 1010469600. Its totient is φ = 331366080.

The previous prime is 668182451. The next prime is 668182469. The reversal of 668182454 is 454281866.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668182451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291794 + ... + 294074.

It is an arithmetic number, because the mean of its divisors is an integer number (63154350).

Almost surely, 2^668182454 is an apocalyptic number.

668182454 is a deficient number, since it is larger than the sum of its proper divisors (342287146).

668182454 is a wasteful number, since it uses less digits than its factorization.

668182454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3415.

The product of its digits is 368640, while the sum is 44.

The square root of 668182454 is about 25849.2254042553. The cubic root of 668182454 is about 874.2420446836.

The spelling of 668182454 in words is "six hundred sixty-eight million, one hundred eighty-two thousand, four hundred fifty-four".