66360563583 has 16 divisors (see below), whose sum is σ = 89417738592. Its totient is φ = 43772480000.

The previous prime is 66360563573. The next prime is 66360563623. The reversal of 66360563583 is 38536506366.

It is a cyclic number.

It is not a de Polignac number, because 66360563583 - 2⁴ = 66360563567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66360563573) 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, 374803 + ... + 522683.

It is an arithmetic number, because the mean of its divisors is an integer number (5588608662).

Almost surely, 2^66360563583 is an apocalyptic number.

66360563583 is a deficient number, since it is larger than the sum of its proper divisors (23057175009).

66360563583 is a wasteful number, since it uses less digits than its factorization.

66360563583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149466.

The product of its (nonzero) digits is 6998400, while the sum is 51.

The spelling of 66360563583 in words is "sixty-six billion, three hundred sixty million, five hundred sixty-three thousand, five hundred eighty-three".