71662270709 has 2 divisors, whose sum is σ = 71662270710. Its totient is φ = 71662270708.

The previous prime is 71662270697. The next prime is 71662270711. The reversal of 71662270709 is 90707226617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63452098609 + 8210172100 = 251897^2 + 90610^2 .

It is a cyclic number.

It is not a de Polignac number, because 71662270709 - 2²⁰ = 71661222133 is a prime.

Together with 71662270711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71662270409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35831135354 + 35831135355.

It is an arithmetic number, because the mean of its divisors is an integer number (35831135355).

Almost surely, 2^71662270709 is an apocalyptic number.

It is an amenable number.

71662270709 is a deficient number, since it is larger than the sum of its proper divisors (1).

71662270709 is an equidigital number, since it uses as much as digits as its factorization.

71662270709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 444528, while the sum is 47.

The spelling of 71662270709 in words is "seventy-one billion, six hundred sixty-two million, two hundred seventy thousand, seven hundred nine".