71066220 has 48 divisors (see below), whose sum is σ = 202257888. Its totient is φ = 18639360.

The previous prime is 71066201. The next prime is 71066221. The reversal of 71066220 is 2266017.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (71066221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6049 + ... + 13368.

It is an arithmetic number, because the mean of its divisors is an integer number (4213706).

Almost surely, 2^71066220 is an apocalyptic number.

It is an amenable number.

71066220 is an abundant number, since it is smaller than the sum of its proper divisors (131191668).

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

71066220 is a wasteful number, since it uses less digits than its factorization.

71066220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19490 (or 19488 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 71066220 is about 8430.0782914514. The cubic root of 71066220 is about 414.2104696594.

The spelling of 71066220 in words is "seventy-one million, sixty-six thousand, two hundred twenty".