66001324563 has 24 divisors (see below), whose sum is σ = 96984096768. Its totient is φ = 43246354032.

The previous prime is 66001324513. The next prime is 66001324567. The reversal of 66001324563 is 36542310066.

66001324563 is a `hidden beast` number, since 6 + 60 + 0 + 1 + 32 + 4 + 563 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-66001324563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66001324567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147531 + ... + 392132.

It is an arithmetic number, because the mean of its divisors is an integer number (4041004032).

Almost surely, 2^66001324563 is an apocalyptic number.

66001324563 is a deficient number, since it is larger than the sum of its proper divisors (30982772205).

66001324563 is a wasteful number, since it uses less digits than its factorization.

66001324563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539903 (or 539900 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 66001324563 in words is "sixty-six billion, one million, three hundred twenty-four thousand, five hundred sixty-three".