6665544455667 has 8 divisors (see below), whose sum is σ = 8887404626880. Its totient is φ = 4443690294120.

The previous prime is 6665544455659. The next prime is 6665544455737. The reversal of 6665544455667 is 7665544455666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6665544455667 - 2³ = 6665544455659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6665544455657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3097492 + ... + 4788062.

It is an arithmetic number, because the mean of its divisors is an integer number (1110925578360).

Almost surely, 2^{6665544455667} is an apocalyptic number.

6665544455667 is a deficient number, since it is larger than the sum of its proper divisors (2221860171213).

6665544455667 is a wasteful number, since it uses less digits than its factorization.

6665544455667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004833.

The product of its digits is 2177280000, while the sum is 69.

Subtracting 6665544455667 from its reverse (7665544455666), we obtain a palindrome (999999999999).

The spelling of 6665544455667 in words is "six trillion, six hundred sixty-five billion, five hundred forty-four million, four hundred fifty-five thousand, six hundred sixty-seven".