2066220571 has 24 divisors (see below), whose sum is σ = 2218485584. Its totient is φ = 1923609600.

The previous prime is 2066220517. The next prime is 2066220593. The reversal of 2066220571 is 1750226602.

It is not a de Polignac number, because 2066220571 - 2²¹ = 2064123419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066220071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3437671 + ... + 3438271.

Almost surely, 2^2066220571 is an apocalyptic number.

2066220571 is a deficient number, since it is larger than the sum of its proper divisors (152265013).

2066220571 is an equidigital number, since it uses as much as digits as its factorization.

2066220571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 788 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2066220571 is about 45455.6989936356. The cubic root of 2066220571 is about 1273.6757895285.

The spelling of 2066220571 in words is "two billion, sixty-six million, two hundred twenty thousand, five hundred seventy-one".