71662435671 has 4 divisors (see below), whose sum is σ = 95549914232. Its totient is φ = 47774957112.

The previous prime is 71662435667. The next prime is 71662435693. The reversal of 71662435671 is 17653426617.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17653426617 = 3 ⋅5884475539.

It is not a de Polignac number, because 71662435671 - 2² = 71662435667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71662435671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71662431671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11943739276 + ... + 11943739281.

It is an arithmetic number, because the mean of its divisors is an integer number (23887478558).

Almost surely, 2^71662435671 is an apocalyptic number.

71662435671 is a deficient number, since it is larger than the sum of its proper divisors (23887478561).

71662435671 is a wasteful number, since it uses less digits than its factorization.

71662435671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23887478560.

The product of its digits is 1270080, while the sum is 48.

The spelling of 71662435671 in words is "seventy-one billion, six hundred sixty-two million, four hundred thirty-five thousand, six hundred seventy-one".