63478566 has 40 divisors (see below), whose sum is σ = 143983224. Its totient is φ = 20900160.

The previous prime is 63478553. The next prime is 63478567. The reversal of 63478566 is 66587436.

63478566 is a `hidden beast` number, since 634 + 7 + 8 + 5 + 6 + 6 = 666.

63478566 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 (63478567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11086 + ... + 15806.

Almost surely, 2^63478566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63478566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71991612).

63478566 is an abundant number, since it is smaller than the sum of its proper divisors (80504658).

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

63478566 is a wasteful number, since it uses less digits than its factorization.

63478566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818 (or 4809 counting only the distinct ones).

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

The square root of 63478566 is about 7967.3437229732. The cubic root of 63478566 is about 398.9107155076.

The spelling of 63478566 in words is "sixty-three million, four hundred seventy-eight thousand, five hundred sixty-six".