2655666544209 has 32 divisors (see below), whose sum is σ = 4186406814720. Its totient is φ = 1465148284992.

The previous prime is 2655666544183. The next prime is 2655666544253. The reversal of 2655666544209 is 9024456665562.

It is not a de Polignac number, because 2655666544209 - 2⁵ = 2655666544177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2655666544109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28422282 + ... + 28515564.

It is an arithmetic number, because the mean of its divisors is an integer number (130825212960).

Almost surely, 2^{2655666544209} is an apocalyptic number.

2655666544209 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2655666544209 is a deficient number, since it is larger than the sum of its proper divisors (1530740270511).

2655666544209 is a wasteful number, since it uses less digits than its factorization.

2655666544209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140069.

The product of its (nonzero) digits is 93312000, while the sum is 60.

The spelling of 2655666544209 in words is "two trillion, six hundred fifty-five billion, six hundred sixty-six million, five hundred forty-four thousand, two hundred nine".