6660143886 has 32 divisors (see below), whose sum is σ = 15032304000. Its totient is φ = 1948630880.

The previous prime is 6660143849. The next prime is 6660143933. The reversal of 6660143886 is 6883410666.

It is a super-4 number, since 4×6660143886⁴ (a number of 40 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1737936 + ... + 1741763.

It is an arithmetic number, because the mean of its divisors is an integer number (469759500).

Almost surely, 2^6660143886 is an apocalyptic number.

6660143886 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6660143886 is an abundant number, since it is smaller than the sum of its proper divisors (8372160114).

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

6660143886 is a wasteful number, since it uses less digits than its factorization.

6660143886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479744.

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 6660143886 is about 81609.7046067439. The cubic root of 6660143886 is about 1881.4580403019.

The spelling of 6660143886 in words is "six billion, six hundred sixty million, one hundred forty-three thousand, eight hundred eighty-six".