66082006772 has 6 divisors (see below), whose sum is σ = 115643511858. Its totient is φ = 33041003384.

The previous prime is 66082006769. The next prime is 66082006811. The reversal of 66082006772 is 27760028066.

It can be written as a sum of positive squares in only one way, i.e., 47661002596 + 18421004176 = 218314^2 + 135724^2 .

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, 8260250843 + ... + 8260250850.

It is an arithmetic number, because the mean of its divisors is an integer number (19273918643).

Almost surely, 2^66082006772 is an apocalyptic number.

It is an amenable number.

66082006772 is a deficient number, since it is larger than the sum of its proper divisors (49561505086).

66082006772 is a wasteful number, since it uses less digits than its factorization.

66082006772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16520501697 (or 16520501695 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 66082006772 in words is "sixty-six billion, eighty-two million, six thousand, seven hundred seventy-two".