2064066861 has 4 divisors (see below), whose sum is σ = 2752089152. Its totient is φ = 1376044572.

The previous prime is 2064066847. The next prime is 2064066863. The reversal of 2064066861 is 1686604602.

2064066861 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2064066861 - 2¹⁰ = 2064065837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2064066863) 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, 344011141 + ... + 344011146.

It is an arithmetic number, because the mean of its divisors is an integer number (688022288).

Almost surely, 2^2064066861 is an apocalyptic number.

It is an amenable number.

2064066861 is a deficient number, since it is larger than the sum of its proper divisors (688022291).

2064066861 is an equidigital number, since it uses as much as digits as its factorization.

2064066861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688022290.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 2064066861 is about 45432.0026082936. The cubic root of 2064066861 is about 1273.2331001131.

The spelling of 2064066861 in words is "two billion, sixty-four million, sixty-six thousand, eight hundred sixty-one".