63866572 has 48 divisors (see below), whose sum is σ = 143861760. Its totient is φ = 24076800.

The previous prime is 63866549. The next prime is 63866587. The reversal of 63866572 is 27566836.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6204 + ... + 12892.

It is an arithmetic number, because the mean of its divisors is an integer number (2997120).

Almost surely, 2^63866572 is an apocalyptic number.

63866572 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63866572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71930880).

63866572 is an abundant number, since it is smaller than the sum of its proper divisors (79995188).

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

63866572 is a wasteful number, since it uses less digits than its factorization.

63866572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6742 (or 6740 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

The square root of 63866572 is about 7991.6563990202. The cubic root of 63866572 is about 399.7218316007.

The spelling of 63866572 in words is "sixty-three million, eight hundred sixty-six thousand, five hundred seventy-two".