447666663 has 16 divisors (see below), whose sum is σ = 615230336. Its totient is φ = 289332000.

The previous prime is 447666647. The next prime is 447666671. The reversal of 447666663 is 366666744.

It is not a de Polignac number, because 447666663 - 2⁴ = 447666647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447666613) 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 15 ways as a sum of consecutive naturals, for example, 24288 + ... + 38538.

It is an arithmetic number, because the mean of its divisors is an integer number (38451896).

Almost surely, 2^447666663 is an apocalyptic number.

447666663 is a deficient number, since it is larger than the sum of its proper divisors (167563673).

447666663 is a wasteful number, since it uses less digits than its factorization.

447666663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14574.

The product of its digits is 2612736, while the sum is 48.

The square root of 447666663 is about 21158.1346767620. The cubic root of 447666663 is about 764.9826490148.

The spelling of 447666663 in words is "four hundred forty-seven million, six hundred sixty-six thousand, six hundred sixty-three".