6665544455605 has 32 divisors (see below), whose sum is σ = 9211050203904. Its totient is φ = 4535814806016.

The previous prime is 6665544455567. The next prime is 6665544455639. The reversal of 6665544455605 is 5065544455666.

It is a cyclic number.

It is not a de Polignac number, because 6665544455605 - 2⁷ = 6665544455477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14557539 + ... + 15008431.

It is an arithmetic number, because the mean of its divisors is an integer number (287845318872).

Almost surely, 2^{6665544455605} is an apocalyptic number.

It is an amenable number.

6665544455605 is a deficient number, since it is larger than the sum of its proper divisors (2545505748299).

6665544455605 is a wasteful number, since it uses less digits than its factorization.

6665544455605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454125.

The product of its (nonzero) digits is 259200000, while the sum is 61.

Adding to 6665544455605 its sum of digits (61), we get a palindrome (6665544455666).

The spelling of 6665544455605 in words is "six trillion, six hundred sixty-five billion, five hundred forty-four million, four hundred fifty-five thousand, six hundred five".