63664236 has 72 divisors (see below), whose sum is σ = 166958064. Its totient is φ = 20442240.

The previous prime is 63664229. The next prime is 63664261. The reversal of 63664236 is 63246636.

63664236 is a `hidden beast` number, since 6 + 3 + 6 + 642 + 3 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 63664236.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116115 + ... + 116661.

It is an arithmetic number, because the mean of its divisors is an integer number (2318862).

Almost surely, 2^63664236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63664236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83479032).

63664236 is an abundant number, since it is smaller than the sum of its proper divisors (103293828).

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

63664236 is a wasteful number, since it uses less digits than its factorization.

63664236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671 (or 666 counting only the distinct ones).

The product of its digits is 93312, while the sum is 36.

The square root of 63664236 is about 7978.9871537683. The cubic root of 63664236 is about 399.2992648090.

The spelling of 63664236 in words is "sixty-three million, six hundred sixty-four thousand, two hundred thirty-six".