66760268537 has 2 divisors, whose sum is σ = 66760268538. Its totient is φ = 66760268536.

The previous prime is 66760268521. The next prime is 66760268543. The reversal of 66760268537 is 73586206766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45838381801 + 20921886736 = 214099^2 + 144644^2 .

It is a cyclic number.

It is not a de Polignac number, because 66760268537 - 2⁴ = 66760268521 is a prime.

It is not a weakly prime, because it can be changed into another prime (66760268507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33380134268 + 33380134269.

It is an arithmetic number, because the mean of its divisors is an integer number (33380134269).

Almost surely, 2^66760268537 is an apocalyptic number.

It is an amenable number.

66760268537 is a deficient number, since it is larger than the sum of its proper divisors (1).

66760268537 is an equidigital number, since it uses as much as digits as its factorization.

66760268537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 66760268537 in words is "sixty-six billion, seven hundred sixty million, two hundred sixty-eight thousand, five hundred thirty-seven".