2006551055665 has 16 divisors (see below), whose sum is σ = 2593157853888. Its totient is φ = 1481717071296.

The previous prime is 2006551055659. The next prime is 2006551055701. The reversal of 2006551055665 is 5665501556002.

It is a cyclic number.

It is not a de Polignac number, because 2006551055665 - 2³ = 2006551055657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1854694 + ... + 2730016.

It is an arithmetic number, because the mean of its divisors is an integer number (162072365868).

Almost surely, 2^{2006551055665} is an apocalyptic number.

It is an amenable number.

2006551055665 is a deficient number, since it is larger than the sum of its proper divisors (586606798223).

2006551055665 is a wasteful number, since it uses less digits than its factorization.

2006551055665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910608.

The product of its (nonzero) digits is 1350000, while the sum is 46.

The spelling of 2006551055665 in words is "two trillion, six billion, five hundred fifty-one million, fifty-five thousand, six hundred sixty-five".