447886666 has 8 divisors (see below), whose sum is σ = 673523460. Its totient is φ = 223378848.

The previous prime is 447886657. The next prime is 447886679. The reversal of 447886666 is 666688744.

It can be written as a sum of positive squares in 2 ways, for example, as 446434641 + 1452025 = 21129^2 + 1205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281251 + ... + 282838.

Almost surely, 2^447886666 is an apocalyptic number.

447886666 is a deficient number, since it is larger than the sum of its proper divisors (225636794).

447886666 is a wasteful number, since it uses less digits than its factorization.

447886666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564488.

The product of its digits is 9289728, while the sum is 55.

The square root of 447886666 is about 21163.3330550743. Note that the first 3 decimals coincide. The cubic root of 447886666 is about 765.1079438152.

The spelling of 447886666 in words is "four hundred forty-seven million, eight hundred eighty-six thousand, six hundred sixty-six".