63916866 has 24 divisors (see below), whose sum is σ = 149139900. Its totient is φ = 19666656.

The previous prime is 63916843. The next prime is 63916873. The reversal of 63916866 is 66861936.

63916866 is a `hidden beast` number, since 639 + 1 + 6 + 8 + 6 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 60512841 + 3404025 = 7779^2 + 1845^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136341 + ... + 136808.

Almost surely, 2^63916866 is an apocalyptic number.

63916866 is an abundant number, since it is smaller than the sum of its proper divisors (85223034).

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

63916866 is a wasteful number, since it uses less digits than its factorization.

63916866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273170 (or 273167 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 63916866 is about 7994.8024365834. The cubic root of 63916866 is about 399.8267291205.

The spelling of 63916866 in words is "sixty-three million, nine hundred sixteen thousand, eight hundred sixty-six".