71267772077 has 2 divisors, whose sum is σ = 71267772078. Its totient is φ = 71267772076.

The previous prime is 71267772067. The next prime is 71267772091. The reversal of 71267772077 is 77027776217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68232753796 + 3035018281 = 261214^2 + 55091^2 .

It is a cyclic number.

It is not a de Polignac number, because 71267772077 - 2⁶ = 71267772013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71267772007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35633886038 + 35633886039.

It is an arithmetic number, because the mean of its divisors is an integer number (35633886039).

Almost surely, 2^71267772077 is an apocalyptic number.

It is an amenable number.

71267772077 is a deficient number, since it is larger than the sum of its proper divisors (1).

71267772077 is an equidigital number, since it uses as much as digits as its factorization.

71267772077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2823576, while the sum is 53.

The spelling of 71267772077 in words is "seventy-one billion, two hundred sixty-seven million, seven hundred seventy-two thousand, seventy-seven".