66028446222806 has 4 divisors (see below), whose sum is σ = 99042669334212. Its totient is φ = 33014223111402.

The previous prime is 66028446222787. The next prime is 66028446222839. The reversal of 66028446222806 is 60822264482066.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16507111555700 + ... + 16507111555703.

It is an arithmetic number, because the mean of its divisors is an integer number (24760667333553).

Almost surely, 2^{66028446222806} is an apocalyptic number.

66028446222806 is a deficient number, since it is larger than the sum of its proper divisors (33014223111406).

66028446222806 is a wasteful number, since it uses less digits than its factorization.

66028446222806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33014223111405.

The product of its (nonzero) digits is 21233664, while the sum is 56.

The spelling of 66028446222806 in words is "sixty-six trillion, twenty-eight billion, four hundred forty-six million, two hundred twenty-two thousand, eight hundred six".