66244563 has 48 divisors (see below), whose sum is σ = 126337536. Its totient is φ = 32382720.

The previous prime is 66244543. The next prime is 66244571. The reversal of 66244563 is 36544266.

It is not a de Polignac number, because 66244563 - 2¹³ = 66236371 is a prime.

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 not an unprimeable number, because it can be changed into a prime (66244543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8970 + ... + 14592.

It is an arithmetic number, because the mean of its divisors is an integer number (2632032).

Almost surely, 2^66244563 is an apocalyptic number.

66244563 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

66244563 is a deficient number, since it is larger than the sum of its proper divisors (60092973).

66244563 is a wasteful number, since it uses less digits than its factorization.

66244563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5664 (or 5661 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 66244563 is about 8139.0762989420. The cubic root of 66244563 is about 404.6225472785.

The spelling of 66244563 in words is "sixty-six million, two hundred forty-four thousand, five hundred sixty-three".