71712866 has 8 divisors (see below), whose sum is σ = 107606124. Its totient is φ = 35844160.

The previous prime is 71712857. The next prime is 71712871. The reversal of 71712866 is 66821717.

It can be written as a sum of positive squares in 2 ways, for example, as 60295225 + 11417641 = 7765^2 + 3379^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5846 + ... + 13326.

Almost surely, 2^71712866 is an apocalyptic number.

71712866 is a deficient number, since it is larger than the sum of its proper divisors (35893258).

71712866 is a wasteful number, since it uses less digits than its factorization.

71712866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12276.

The product of its digits is 28224, while the sum is 38.

The square root of 71712866 is about 8468.3449386524. The cubic root of 71712866 is about 415.4630067326.

The spelling of 71712866 in words is "seventy-one million, seven hundred twelve thousand, eight hundred sixty-six".