66004563 has 16 divisors (see below), whose sum is σ = 89346816. Its totient is φ = 43337760.

The previous prime is 66004541. The next prime is 66004607. The reversal of 66004563 is 36540066.

It is not a de Polignac number, because 66004563 - 2⁵ = 66004531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66004563.

It is not an unprimeable number, because it can be changed into a prime (66004513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69673 + ... + 70613.

It is an arithmetic number, because the mean of its divisors is an integer number (5584176).

Almost surely, 2^66004563 is an apocalyptic number.

66004563 is a deficient number, since it is larger than the sum of its proper divisors (23342253).

66004563 is a wasteful number, since it uses less digits than its factorization.

66004563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 66004563 is about 8124.3192330189. The cubic root of 66004563 is about 404.1333150689.

The spelling of 66004563 in words is "sixty-six million, four thousand, five hundred sixty-three".