6646554636611 has 16 divisors (see below), whose sum is σ = 6700434048000. Its totient is φ = 6592805498208.

The previous prime is 6646554636581. The next prime is 6646554636613. The reversal of 6646554636611 is 1166364556466.

It is a cyclic number.

It is not a de Polignac number, because 6646554636611 - 2³⁴ = 6629374767427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6646554636613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342543236 + ... + 342562638.

It is an arithmetic number, because the mean of its divisors is an integer number (418777128000).

Almost surely, 2^{6646554636611} is an apocalyptic number.

6646554636611 is a deficient number, since it is larger than the sum of its proper divisors (53879411389).

6646554636611 is a wasteful number, since it uses less digits than its factorization.

6646554636611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22618.

The product of its digits is 55987200, while the sum is 59.

The spelling of 6646554636611 in words is "six trillion, six hundred forty-six billion, five hundred fifty-four million, six hundred thirty-six thousand, six hundred eleven".