71066407 has 4 divisors (see below), whose sum is σ = 72799776. Its totient is φ = 69333040.

The previous prime is 71066357. The next prime is 71066419. The reversal of 71066407 is 70466017.

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

It is a cyclic number.

It is not a de Polignac number, because 71066407 - 2¹¹ = 71064359 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71066467) 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 3 ways as a sum of consecutive naturals, for example, 866623 + ... + 866704.

It is an arithmetic number, because the mean of its divisors is an integer number (18199944).

Almost surely, 2^71066407 is an apocalyptic number.

71066407 is a deficient number, since it is larger than the sum of its proper divisors (1733369).

71066407 is a wasteful number, since it uses less digits than its factorization.

71066407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733368.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 71066407 is about 8430.0893826815. The cubic root of 71066407 is about 414.2108329698.

The spelling of 71066407 in words is "seventy-one million, sixty-six thousand, four hundred seven".