2066142561 has 32 divisors (see below), whose sum is σ = 3300261888. Its totient is φ = 1125048960.

The previous prime is 2066142521. The next prime is 2066142587. The reversal of 2066142561 is 1652416602.

It is a de Polignac number, because none of the positive numbers 2^k-2066142561 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2066142521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9120 + ... + 64926.

It is an arithmetic number, because the mean of its divisors is an integer number (103133184).

Almost surely, 2^2066142561 is an apocalyptic number.

2066142561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2066142561 is a deficient number, since it is larger than the sum of its proper divisors (1234119327).

2066142561 is a wasteful number, since it uses less digits than its factorization.

2066142561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55901.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 2066142561 is about 45454.8408973126. The cubic root of 2066142561 is about 1273.6597601494.

The spelling of 2066142561 in words is "two billion, sixty-six million, one hundred forty-two thousand, five hundred sixty-one".