66651066606 has 32 divisors (see below), whose sum is σ = 141764636160. Its totient is φ = 20830715136.

The previous prime is 66651066593. The next prime is 66651066631. The reversal of 66651066606 is 60666015666.

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 15 ways as a sum of consecutive naturals, for example, 3002646 + ... + 3024761.

It is an arithmetic number, because the mean of its divisors is an integer number (4430144880).

Almost surely, 2^66651066606 is an apocalyptic number.

66651066606 is an abundant number, since it is smaller than the sum of its proper divisors (75113569554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66651066606 is a wasteful number, since it uses less digits than its factorization.

66651066606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6027528.

The product of its (nonzero) digits is 1399680, while the sum is 48.

The spelling of 66651066606 in words is "sixty-six billion, six hundred fifty-one million, sixty-six thousand, six hundred six".