2006560991 has 2 divisors, whose sum is σ = 2006560992. Its totient is φ = 2006560990.

The previous prime is 2006560943. The next prime is 2006561003. The reversal of 2006560991 is 1990656002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2006560991 - 2²² = 2002366687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2006560921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1003280495 + 1003280496.

It is an arithmetic number, because the mean of its divisors is an integer number (1003280496).

Almost surely, 2^2006560991 is an apocalyptic number.

2006560991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2006560991 is an equidigital number, since it uses as much as digits as its factorization.

2006560991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 2006560991 is about 44794.6535983927. The cubic root of 2006560991 is about 1261.2972678760.

The spelling of 2006560991 in words is "two billion, six million, five hundred sixty thousand, nine hundred ninety-one".