71433666 has 12 divisors (see below), whose sum is σ = 154772982. Its totient is φ = 23811216.

The previous prime is 71433631. The next prime is 71433667. The reversal of 71433666 is 66633417.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59675625 + 11758041 = 7725^2 + 3429^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71433666.

It is not an unprimeable number, because it can be changed into a prime (71433667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1984251 + ... + 1984286.

Almost surely, 2^71433666 is an apocalyptic number.

71433666 is an abundant number, since it is smaller than the sum of its proper divisors (83339316).

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

71433666 is a wasteful number, since it uses less digits than its factorization.

71433666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968545 (or 3968542 counting only the distinct ones).

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

The square root of 71433666 is about 8451.8439408214. The cubic root of 71433666 is about 414.9231308732.

The spelling of 71433666 in words is "seventy-one million, four hundred thirty-three thousand, six hundred sixty-six".