63681606 has 16 divisors (see below), whose sum is σ = 141514800. Its totient is φ = 21227184.

The previous prime is 63681587. The next prime is 63681617. The reversal of 63681606 is 60618636.

63681606 is a `hidden beast` number, since 636 + 8 + 16 + 0 + 6 = 666.

It is a congruent number.

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, 589591 + ... + 589698.

It is an arithmetic number, because the mean of its divisors is an integer number (8844675).

Almost surely, 2^63681606 is an apocalyptic number.

63681606 is an abundant number, since it is smaller than the sum of its proper divisors (77833194).

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

63681606 is a wasteful number, since it uses less digits than its factorization.

63681606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179300 (or 1179294 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 63681606 is about 7980.0755635520. The cubic root of 63681606 is about 399.3355761300.

The spelling of 63681606 in words is "sixty-three million, six hundred eighty-one thousand, six hundred six".