2066621959 has 2 divisors, whose sum is σ = 2066621960. Its totient is φ = 2066621958.

The previous prime is 2066621941. The next prime is 2066622031. The reversal of 2066621959 is 9591266602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2066621959 - 2⁵ = 2066621927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2066661959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033310979 + 1033310980.

It is an arithmetic number, because the mean of its divisors is an integer number (1033310980).

Almost surely, 2^2066621959 is an apocalyptic number.

2066621959 is a deficient number, since it is larger than the sum of its proper divisors (1).

2066621959 is an equidigital number, since it uses as much as digits as its factorization.

2066621959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 2066621959 is about 45460.1139351850. The cubic root of 2066621959 is about 1273.7582597617.

The spelling of 2066621959 in words is "two billion, sixty-six million, six hundred twenty-one thousand, nine hundred fifty-nine".