6665440171530 has 128 divisors (see below), whose sum is σ = 18927110135808. Its totient is φ = 1470687293952.

The previous prime is 6665440171499. The next prime is 6665440171583. The reversal of 6665440171530 is 351710445666.

It is a self number, because there is not a number n which added to its sum of digits gives 6665440171530.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3904992 + ... + 5346011.

It is an arithmetic number, because the mean of its divisors is an integer number (147868047936).

Almost surely, 2^{6665440171530} is an apocalyptic number.

6665440171530 is an abundant number, since it is smaller than the sum of its proper divisors (12261669964278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6665440171530 is a wasteful number, since it uses less digits than its factorization.

6665440171530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9251140.

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 6665440171530 in words is "six trillion, six hundred sixty-five billion, four hundred forty million, one hundred seventy-one thousand, five hundred thirty".