451664806 has 12 divisors (see below), whose sum is σ = 719695188. Its totient is φ = 212547872.

The previous prime is 451664791. The next prime is 451664833. The reversal of 451664806 is 608466154.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 390136 + ... + 391291.

It is an arithmetic number, because the mean of its divisors is an integer number (59974599).

Almost surely, 2^451664806 is an apocalyptic number.

451664806 is a deficient number, since it is larger than the sum of its proper divisors (268030382).

451664806 is a wasteful number, since it uses less digits than its factorization.

451664806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781463 (or 781446 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 451664806 is about 21252.4070636716. The cubic root of 451664806 is about 767.2532742578.

The spelling of 451664806 in words is "four hundred fifty-one million, six hundred sixty-four thousand, eight hundred six".