2066666022840 has 64 divisors (see below), whose sum is σ = 6204808461600. Its totient is φ = 550683348992.

The previous prime is 2066666022793. The next prime is 2066666022847. The reversal of 2066666022840 is 482206666602.

It is a super-2 number, since 2×2066666022840² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2066666022840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066666022847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6525777 + ... + 6835136.

Almost surely, 2^{2066666022840} is an apocalyptic number.

2066666022840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2066666022840 is an abundant number, since it is smaller than the sum of its proper divisors (4138142438760).

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

2066666022840 is a wasteful number, since it uses less digits than its factorization.

2066666022840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13362216 (or 13362212 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 48.

The spelling of 2066666022840 in words is "two trillion, sixty-six billion, six hundred sixty-six million, twenty-two thousand, eight hundred forty".