2003555034666 has 24 divisors (see below), whose sum is σ = 4341125621664. Its totient is φ = 667837876200.

The previous prime is 2003555034643. The next prime is 2003555034673. The reversal of 2003555034666 is 6664305553002.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 235326 + ... + 2015561.

It is an arithmetic number, because the mean of its divisors is an integer number (180880234236).

Almost surely, 2^{2003555034666} is an apocalyptic number.

2003555034666 is an abundant number, since it is smaller than the sum of its proper divisors (2337570586998).

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

2003555034666 is a wasteful number, since it uses less digits than its factorization.

2003555034666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300346 (or 2300343 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 45.

The spelling of 2003555034666 in words is "two trillion, three billion, five hundred fifty-five million, thirty-four thousand, six hundred sixty-six".