66222399646 has 8 divisors (see below), whose sum is σ = 106974645624. Its totient is φ = 30564184440.

The previous prime is 66222399637. The next prime is 66222399697. The reversal of 66222399646 is 64699322266.

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, 1273507660 + ... + 1273507711.

It is an arithmetic number, because the mean of its divisors is an integer number (13371830703).

Almost surely, 2^66222399646 is an apocalyptic number.

66222399646 is a deficient number, since it is larger than the sum of its proper divisors (40752245978).

66222399646 is a wasteful number, since it uses less digits than its factorization.

66222399646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2547015386.

The product of its digits is 10077696, while the sum is 55.

The spelling of 66222399646 in words is "sixty-six billion, two hundred twenty-two million, three hundred ninety-nine thousand, six hundred forty-six".