66463367544 has 288 divisors, whose sum is σ = 222619222800. Its totient is φ = 17810150400.

The previous prime is 66463367533. The next prime is 66463367549. The reversal of 66463367544 is 44576336466.

66463367544 is a `hidden beast` number, since 6 + 6 + 4 + 6 + 33 + 67 + 544 = 666.

66463367544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66463367549) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6765324 + ... + 6775140.

Almost surely, 2^66463367544 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 66463367544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111309611400).

66463367544 is an abundant number, since it is smaller than the sum of its proper divisors (156155855256).

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

66463367544 is a wasteful number, since it uses less digits than its factorization.

66463367544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9963 (or 9949 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 54.

The spelling of 66463367544 in words is "sixty-six billion, four hundred sixty-three million, three hundred sixty-seven thousand, five hundred forty-four".