71666334 has 12 divisors (see below), whose sum is σ = 155277096. Its totient is φ = 23888772.

The previous prime is 71666333. The next prime is 71666369. The reversal of 71666334 is 43366617.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71666333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1990714 + ... + 1990749.

It is an arithmetic number, because the mean of its divisors is an integer number (12939758).

Almost surely, 2^71666334 is an apocalyptic number.

71666334 is an abundant number, since it is smaller than the sum of its proper divisors (83610762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71666334 is a wasteful number, since it uses less digits than its factorization.

71666334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981471 (or 3981468 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 71666334 is about 8465.5970846716. The cubic root of 71666334 is about 415.3731274284.

The spelling of 71666334 in words is "seventy-one million, six hundred sixty-six thousand, three hundred thirty-four".