2006861771 has 2 divisors, whose sum is σ = 2006861772. Its totient is φ = 2006861770.

The previous prime is 2006861767. The next prime is 2006861777. The reversal of 2006861771 is 1771686002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2006861771 - 2² = 2006861767 is a prime.

It is not a weakly prime, because it can be changed into another prime (2006861777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1003430885 + 1003430886.

It is an arithmetic number, because the mean of its divisors is an integer number (1003430886).

Almost surely, 2^2006861771 is an apocalyptic number.

2006861771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2006861771 is an equidigital number, since it uses as much as digits as its factorization.

2006861771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 2006861771 is about 44798.0107928912. The cubic root of 2006861771 is about 1261.3602868157.

The spelling of 2006861771 in words is "two billion, six million, eight hundred sixty-one thousand, seven hundred seventy-one".