71145866 has 8 divisors (see below), whose sum is σ = 116420544. Its totient is φ = 32339020.

The previous prime is 71145859. The next prime is 71145869. The reversal of 71145866 is 66854117.

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 (71145869) 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, 1616930 + ... + 1616973.

It is an arithmetic number, because the mean of its divisors is an integer number (14552568).

Almost surely, 2^71145866 is an apocalyptic number.

71145866 is a deficient number, since it is larger than the sum of its proper divisors (45274678).

71145866 is a wasteful number, since it uses less digits than its factorization.

71145866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233916.

The product of its digits is 40320, while the sum is 38.

The square root of 71145866 is about 8434.8008868022. The cubic root of 71145866 is about 414.3651511680.

The spelling of 71145866 in words is "seventy-one million, one hundred forty-five thousand, eight hundred sixty-six".