2066688840 has 64 divisors (see below), whose sum is σ = 6245372160. Its totient is φ = 547089920.

The previous prime is 2066688823. The next prime is 2066688853. The reversal of 2066688840 is 488866602.

It is a happy number.

It is a super-2 number, since 2×2066688840² = 8542405522761091200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2066688840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46416 + ... + 79295.

It is an arithmetic number, because the mean of its divisors is an integer number (97583940).

Almost surely, 2^2066688840 is an apocalyptic number.

2066688840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2066688840 is an abundant number, since it is smaller than the sum of its proper divisors (4178683320).

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

2066688840 is a wasteful number, since it uses less digits than its factorization.

2066688840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125862 (or 125858 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 48.

The square root of 2066688840 is about 45460.8495301177. The cubic root of 2066688840 is about 1273.7720002698.

The spelling of 2066688840 in words is "two billion, sixty-six million, six hundred eighty-eight thousand, eight hundred forty".