71663441227 has 4 divisors (see below), whose sum is σ = 81901075696. Its totient is φ = 61425806760.

The previous prime is 71663441207. The next prime is 71663441309. The reversal of 71663441227 is 72214436617.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71663441227 - 2¹¹ = 71663439179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71663441207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5118817224 + ... + 5118817237.

It is an arithmetic number, because the mean of its divisors is an integer number (20475268924).

Almost surely, 2^71663441227 is an apocalyptic number.

71663441227 is a deficient number, since it is larger than the sum of its proper divisors (10237634469).

71663441227 is a wasteful number, since it uses less digits than its factorization.

71663441227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10237634468.

The product of its digits is 338688, while the sum is 43.

The spelling of 71663441227 in words is "seventy-one billion, six hundred sixty-three million, four hundred forty-one thousand, two hundred twenty-seven".