66854984444 has 6 divisors (see below), whose sum is σ = 116996222784. Its totient is φ = 33427492220.

The previous prime is 66854984437. The next prime is 66854984491. The reversal of 66854984444 is 44448945866.

It is a happy number.

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, 8356873052 + ... + 8356873059.

It is an arithmetic number, because the mean of its divisors is an integer number (19499370464).

Almost surely, 2^66854984444 is an apocalyptic number.

It is an amenable number.

66854984444 is a deficient number, since it is larger than the sum of its proper divisors (50141238340).

66854984444 is a wasteful number, since it uses less digits than its factorization.

66854984444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16713746115 (or 16713746113 counting only the distinct ones).

The product of its digits is 106168320, while the sum is 62.

The spelling of 66854984444 in words is "sixty-six billion, eight hundred fifty-four million, nine hundred eighty-four thousand, four hundred forty-four".