71668726 has 4 divisors (see below), whose sum is σ = 107503092. Its totient is φ = 35834362.

The previous prime is 71668711. The next prime is 71668733. The reversal of 71668726 is 62786617.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17917180 + ... + 17917183.

It is an arithmetic number, because the mean of its divisors is an integer number (26875773).

Almost surely, 2^71668726 is an apocalyptic number.

71668726 is a deficient number, since it is larger than the sum of its proper divisors (35834366).

71668726 is a wasteful number, since it uses less digits than its factorization.

71668726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35834365.

The product of its digits is 169344, while the sum is 43.

The square root of 71668726 is about 8465.7383611827. The cubic root of 71668726 is about 415.3777486660.

The spelling of 71668726 in words is "seventy-one million, six hundred sixty-eight thousand, seven hundred twenty-six".