2066886864 has 120 divisors (see below), whose sum is σ = 6679225280. Its totient is φ = 584423424.

The previous prime is 2066886863. The next prime is 2066886883. The reversal of 2066886864 is 4686886602.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2066886864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066886863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87207 + ... + 108345.

Almost surely, 2^2066886864 is an apocalyptic number.

2066886864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2066886864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3339612640).

2066886864 is an abundant number, since it is smaller than the sum of its proper divisors (4612338416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2066886864 is a wasteful number, since it uses less digits than its factorization.

2066886864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21257 (or 21248 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 54.

The square root of 2066886864 is about 45463.0274398879. The cubic root of 2066886864 is about 1273.8126819899.

The spelling of 2066886864 in words is "two billion, sixty-six million, eight hundred eighty-six thousand, eight hundred sixty-four".