447827661 has 12 divisors (see below), whose sum is σ = 648308700. Its totient is φ = 297884160.

The previous prime is 447827659. The next prime is 447827669. The reversal of 447827661 is 166728744.

447827661 is a `hidden beast` number, since 447 + 82 + 76 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 116769636 + 331058025 = 10806^2 + 18195^2 .

It is not a de Polignac number, because 447827661 - 2¹ = 447827659 is a prime.

It is a super-2 number, since 2×447827661² = 401099227913461842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447827669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51370 + ... + 59451.

It is an arithmetic number, because the mean of its divisors is an integer number (54025725).

Almost surely, 2^447827661 is an apocalyptic number.

It is an amenable number.

447827661 is a deficient number, since it is larger than the sum of its proper divisors (200481039).

447827661 is a wasteful number, since it uses less digits than its factorization.

447827661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111276 (or 111273 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 447827661 is about 21161.9389707087. The cubic root of 447827661 is about 765.0743436656.

The spelling of 447827661 in words is "four hundred forty-seven million, eight hundred twenty-seven thousand, six hundred sixty-one".