66588294277 has 2 divisors, whose sum is σ = 66588294278. Its totient is φ = 66588294276.

The previous prime is 66588294193. The next prime is 66588294329. The reversal of 66588294277 is 77249288566.

66588294277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62419525921 + 4168768356 = 249839^2 + 64566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66588294277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66588294077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33294147138 + 33294147139.

It is an arithmetic number, because the mean of its divisors is an integer number (33294147139).

Almost surely, 2^66588294277 is an apocalyptic number.

It is an amenable number.

66588294277 is a deficient number, since it is larger than the sum of its proper divisors (1).

66588294277 is an equidigital number, since it uses as much as digits as its factorization.

66588294277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81285120, while the sum is 64.

The spelling of 66588294277 in words is "sixty-six billion, five hundred eighty-eight million, two hundred ninety-four thousand, two hundred seventy-seven".