66580008566 has 8 divisors (see below), whose sum is σ = 99871107840. Its totient is φ = 33289639288.

The previous prime is 66580008533. The next prime is 66580008571.

66580008566 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263900 + ... + 450336.

It is an arithmetic number, because the mean of its divisors is an integer number (12483888480).

Almost surely, 2^66580008566 is an apocalyptic number.

66580008566 is a deficient number, since it is larger than the sum of its proper divisors (33291099274).

66580008566 is a wasteful number, since it uses less digits than its factorization.

66580008566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364998.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 66580008566 in words is "sixty-six billion, five hundred eighty million, eight thousand, five hundred sixty-six".