71566745 has 16 divisors (see below), whose sum is σ = 87118848. Its totient is φ = 56434560.

The previous prime is 71566739. The next prime is 71566763. The reversal of 71566745 is 54766517.

It is not a de Polignac number, because 71566745 - 2¹⁰ = 71565721 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130562 + ... + 131108.

It is an arithmetic number, because the mean of its divisors is an integer number (5444928).

Almost surely, 2^71566745 is an apocalyptic number.

It is an amenable number.

71566745 is a deficient number, since it is larger than the sum of its proper divisors (15552103).

71566745 is a wasteful number, since it uses less digits than its factorization.

71566745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its digits is 176400, while the sum is 41.

The square root of 71566745 is about 8459.7130565995. The cubic root of 71566745 is about 415.1806345792.

The spelling of 71566745 in words is "seventy-one million, five hundred sixty-six thousand, seven hundred forty-five".