63808866 has 36 divisors (see below), whose sum is σ = 151968726. Its totient is φ = 19335360.

The previous prime is 63808841. The next prime is 63808879. The reversal of 63808866 is 66880836.

63808866 is a `hidden beast` number, since 638 + 0 + 8 + 8 + 6 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49406841 + 14402025 = 7029^2 + 3795^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12471 + ... + 16826.

Almost surely, 2^63808866 is an apocalyptic number.

63808866 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

63808866 is an abundant number, since it is smaller than the sum of its proper divisors (88159860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63808866 is a wasteful number, since it uses less digits than its factorization.

63808866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29327 (or 29313 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 63808866 is about 7988.0451926613. The cubic root of 63808866 is about 399.6014071079.

The spelling of 63808866 in words is "sixty-three million, eight hundred eight thousand, eight hundred sixty-six".