63758664 has 80 divisors (see below), whose sum is σ = 181623420. Its totient is φ = 20891520.

The previous prime is 63758663. The next prime is 63758683. The reversal of 63758664 is 46685736.

63758664 is a `hidden beast` number, since 6 + 3 + 7 + 586 + 64 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 60186564 + 3572100 = 7758^2 + 1890^2 .

It is not an unprimeable number, because it can be changed into a prime (63758663) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38722 + ... + 40334.

Almost surely, 2^63758664 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 63758664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90811710).

63758664 is an abundant number, since it is smaller than the sum of its proper divisors (117864756).

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

63758664 is a wasteful number, since it uses less digits than its factorization.

63758664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692 (or 1679 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 63758664 is about 7984.9022536284. The cubic root of 63758664 is about 399.4965833617.

The spelling of 63758664 in words is "sixty-three million, seven hundred fifty-eight thousand, six hundred sixty-four".