71446666 has 8 divisors (see below), whose sum is σ = 108153540. Its totient is φ = 35395488.

The previous prime is 71446663. The next prime is 71446709. The reversal of 71446666 is 66664417.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68310225 + 3136441 = 8265^2 + 1771^2 .

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

It is not an unprimeable number, because it can be changed into a prime (71446663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163651 + ... + 164086.

Almost surely, 2^71446666 is an apocalyptic number.

71446666 is a deficient number, since it is larger than the sum of its proper divisors (36706874).

71446666 is a wasteful number, since it uses less digits than its factorization.

71446666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327848.

The product of its digits is 145152, while the sum is 40.

The square root of 71446666 is about 8452.6129687807. The cubic root of 71446666 is about 414.9482995545.

The spelling of 71446666 in words is "seventy-one million, four hundred forty-six thousand, six hundred sixty-six".