66685055337 has 12 divisors (see below), whose sum is σ = 96441932340. Its totient is φ = 44401746048.

The previous prime is 66685055303. The next prime is 66685055351. The reversal of 66685055337 is 73355058666.

It can be written as a sum of positive squares in 2 ways, for example, as 44034504336 + 22650551001 = 209844^2 + 150501^2 .

It is not a de Polignac number, because 66685055337 - 2¹⁹ = 66684531049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66685055377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4572108 + ... + 4586669.

It is an arithmetic number, because the mean of its divisors is an integer number (8036827695).

Almost surely, 2^66685055337 is an apocalyptic number.

It is an amenable number.

66685055337 is a deficient number, since it is larger than the sum of its proper divisors (29756877003).

66685055337 is a wasteful number, since it uses less digits than its factorization.

66685055337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9159592 (or 9159589 counting only the distinct ones).

The product of its (nonzero) digits is 13608000, while the sum is 54.

The spelling of 66685055337 in words is "sixty-six billion, six hundred eighty-five million, fifty-five thousand, three hundred thirty-seven".