2064166421 has 8 divisors (see below), whose sum is σ = 2070128280. Its totient is φ = 2058213888.

The previous prime is 2064166393. The next prime is 2064166427. The reversal of 2064166421 is 1246614602.

It can be written as a sum of positive squares in 4 ways, for example, as 854100625 + 1210065796 = 29225^2 + 34786^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2064166421 - 2¹⁴ = 2064150037 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 (2064166427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 736595 + ... + 739391.

It is an arithmetic number, because the mean of its divisors is an integer number (258766035).

Almost surely, 2^2064166421 is an apocalyptic number.

It is an amenable number.

2064166421 is a deficient number, since it is larger than the sum of its proper divisors (5961859).

2064166421 is a wasteful number, since it uses less digits than its factorization.

2064166421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4663.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 2064166421 is about 45433.0982984872. The cubic root of 2064166421 is about 1273.2535711956.

The spelling of 2064166421 in words is "two billion, sixty-four million, one hundred sixty-six thousand, four hundred twenty-one".