66502020566 has 8 divisors (see below), whose sum is σ = 99760284624. Its totient is φ = 33248592360.

The previous prime is 66502020521. The next prime is 66502020581.

66502020566 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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1174385 + ... + 1229708.

It is an arithmetic number, because the mean of its divisors is an integer number (12470035578).

Almost surely, 2^66502020566 is an apocalyptic number.

66502020566 is a deficient number, since it is larger than the sum of its proper divisors (33258264058).

66502020566 is a wasteful number, since it uses less digits than its factorization.

66502020566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417926.

The product of its (nonzero) digits is 129600, while the sum is 38.

It can be divided in two parts, 665020 and 20566, that added together give a palindrome (685586).

The spelling of 66502020566 in words is "sixty-six billion, five hundred two million, twenty thousand, five hundred sixty-six".