66583474273 has 2 divisors, whose sum is σ = 66583474274. Its totient is φ = 66583474272.

The previous prime is 66583474261. The next prime is 66583474351. The reversal of 66583474273 is 37247438566.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54610081344 + 11973392929 = 233688^2 + 109423^2 .

It is a cyclic number.

It is not a de Polignac number, because 66583474273 - 2⁵ = 66583474241 is a prime.

It is not a weakly prime, because it can be changed into another prime (66583474253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33291737136 + 33291737137.

It is an arithmetic number, because the mean of its divisors is an integer number (33291737137).

Almost surely, 2^66583474273 is an apocalyptic number.

It is an amenable number.

66583474273 is a deficient number, since it is larger than the sum of its proper divisors (1).

66583474273 is an equidigital number, since it uses as much as digits as its factorization.

66583474273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 55.

The spelling of 66583474273 in words is "sixty-six billion, five hundred eighty-three million, four hundred seventy-four thousand, two hundred seventy-three".