71042406661 has 8 divisors (see below), whose sum is σ = 71189262144. Its totient is φ = 70895625600.

The previous prime is 71042406629. The next prime is 71042406679. The reversal of 71042406661 is 16660424017.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71042406661 - 2⁵ = 71042406629 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 71042406661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71042404661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2149461 + ... + 2182261.

It is an arithmetic number, because the mean of its divisors is an integer number (8898657768).

Almost surely, 2^71042406661 is an apocalyptic number.

It is an amenable number.

71042406661 is a deficient number, since it is larger than the sum of its proper divisors (146855483).

71042406661 is a wasteful number, since it uses less digits than its factorization.

71042406661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37211.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 71042406661 in words is "seventy-one billion, forty-two million, four hundred six thousand, six hundred sixty-one".