447646666 has 16 divisors (see below), whose sum is σ = 677837160. Its totient is φ = 221711040.

The previous prime is 447646657. The next prime is 447646691. The reversal of 447646666 is 666646744.

It can be written as a sum of positive squares in 4 ways, for example, as 43837641 + 403809025 = 6621^2 + 20095^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95080 + ... + 99676.

Almost surely, 2^447646666 is an apocalyptic number.

447646666 is a deficient number, since it is larger than the sum of its proper divisors (230190494).

447646666 is a wasteful number, since it uses less digits than its factorization.

447646666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5049.

The product of its digits is 3483648, while the sum is 49.

The square root of 447646666 is about 21157.6621109233. The cubic root of 447646666 is about 764.9712584073.

The spelling of 447646666 in words is "four hundred forty-seven million, six hundred forty-six thousand, six hundred sixty-six".