2066434121 has 4 divisors (see below), whose sum is σ = 2137690500. Its totient is φ = 1995177744.

The previous prime is 2066434081. The next prime is 2066434159. The reversal of 2066434121 is 1214346602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 752734096 + 1313700025 = 27436^2 + 36245^2 .

It is a cyclic number.

It is not a de Polignac number, because 2066434121 - 2¹⁴ = 2066417737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 71256349 = 2066434121 / (2 + 0 + 6 + 6 + 4 + 3 + 4 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066433121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35628146 + ... + 35628203.

It is an arithmetic number, because the mean of its divisors is an integer number (534422625).

Almost surely, 2^2066434121 is an apocalyptic number.

It is an amenable number.

2066434121 is a deficient number, since it is larger than the sum of its proper divisors (71256379).

2066434121 is an equidigital number, since it uses as much as digits as its factorization.

2066434121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71256378.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 2066434121 is about 45458.0479233326. The cubic root of 2066434121 is about 1273.7196674021.

The spelling of 2066434121 in words is "two billion, sixty-six million, four hundred thirty-four thousand, one hundred twenty-one".