66206272676066 has 16 divisors (see below), whose sum is σ = 99696416527800. Its totient is φ = 32974135357440.

The previous prime is 66206272676039. The next prime is 66206272676083. The reversal of 66206272676066 is 66067627260266.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 62714124600625 + 3492148075441 = 7919225^2 + 1868729^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129983660 + ... + 130492008.

Almost surely, 2^{66206272676066} is an apocalyptic number.

66206272676066 is a deficient number, since it is larger than the sum of its proper divisors (33490143851734).

66206272676066 is a wasteful number, since it uses less digits than its factorization.

66206272676066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761989.

The product of its (nonzero) digits is 109734912, while the sum is 62.

The spelling of 66206272676066 in words is "sixty-six trillion, two hundred six billion, two hundred seventy-two million, six hundred seventy-six thousand, sixty-six".