266228797477 has 2 divisors, whose sum is σ = 266228797478. Its totient is φ = 266228797476.

The previous prime is 266228797451. The next prime is 266228797489. The reversal of 266228797477 is 774797822662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164798650116 + 101430147361 = 405954^2 + 318481^2 .

It is a cyclic number.

It is not a de Polignac number, because 266228797477 - 2²³ = 266220408869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266228792477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133114398738 + 133114398739.

It is an arithmetic number, because the mean of its divisors is an integer number (133114398739).

Almost surely, 2^266228797477 is an apocalyptic number.

It is an amenable number.

266228797477 is a deficient number, since it is larger than the sum of its proper divisors (1).

266228797477 is an equidigital number, since it uses as much as digits as its factorization.

266228797477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 199148544, while the sum is 67.

The spelling of 266228797477 in words is "two hundred sixty-six billion, two hundred twenty-eight million, seven hundred ninety-seven thousand, four hundred seventy-seven".