6640204006 has 16 divisors (see below), whose sum is σ = 10447792128. Its totient is φ = 3159118600.

The previous prime is 6640203991. The next prime is 6640204013. The reversal of 6640204006 is 6004020466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369100 + ... + 386671.

It is an arithmetic number, because the mean of its divisors is an integer number (652987008).

Almost surely, 2^6640204006 is an apocalyptic number.

6640204006 is a deficient number, since it is larger than the sum of its proper divisors (3807588122).

6640204006 is a wasteful number, since it uses less digits than its factorization.

6640204006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755987.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 6640204006 is about 81487.4469228236. The cubic root of 6640204006 is about 1879.5785238582.

The spelling of 6640204006 in words is "six billion, six hundred forty million, two hundred four thousand, six".