6640143225 has 24 divisors (see below), whose sum is σ = 11045742432. Its totient is φ = 3519676800.

The previous prime is 6640143179. The next prime is 6640143269. The reversal of 6640143225 is 5223410466.

It is not a de Polignac number, because 6640143225 - 2¹¹ = 6640141177 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 259356 + ... + 283805.

It is an arithmetic number, because the mean of its divisors is an integer number (460239268).

Almost surely, 2^6640143225 is an apocalyptic number.

It is an amenable number.

6640143225 is a deficient number, since it is larger than the sum of its proper divisors (4405599207).

6640143225 is a wasteful number, since it uses less digits than its factorization.

6640143225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543337 (or 543332 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 6640143225 is about 81487.0739749563. The cubic root of 6640143225 is about 1879.5727889435.

The spelling of 6640143225 in words is "six billion, six hundred forty million, one hundred forty-three thousand, two hundred twenty-five".