71066920 has 16 divisors (see below), whose sum is σ = 159900660. Its totient is φ = 28426752.

The previous prime is 71066909. The next prime is 71066959. The reversal of 71066920 is 2966017.

It can be written as a sum of positive squares in 2 ways, for example, as 57183844 + 13883076 = 7562^2 + 3726^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888297 + ... + 888376.

Almost surely, 2^71066920 is an apocalyptic number.

It is an amenable number.

71066920 is an abundant number, since it is smaller than the sum of its proper divisors (88833740).

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

71066920 is a wasteful number, since it uses less digits than its factorization.

71066920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776684 (or 1776680 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 71066920 is about 8430.1198093503. The cubic root of 71066920 is about 414.2118296415.

The spelling of 71066920 in words is "seventy-one million, sixty-six thousand, nine hundred twenty".