6665324457980 has 24 divisors (see below), whose sum is σ = 14733875118480. Its totient is φ = 2525807162880.

The previous prime is 6665324457941. The next prime is 6665324458021. The reversal of 6665324457980 is 897544235666.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8770163381 + ... + 8770164140.

It is an arithmetic number, because the mean of its divisors is an integer number (613911463270).

Almost surely, 2^{6665324457980} is an apocalyptic number.

It is an amenable number.

6665324457980 is an abundant number, since it is smaller than the sum of its proper divisors (8068550660500).

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

6665324457980 is a wasteful number, since it uses less digits than its factorization.

6665324457980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17540327549 (or 17540327547 counting only the distinct ones).

The product of its (nonzero) digits is 261273600, while the sum is 65.

The spelling of 6665324457980 in words is "six trillion, six hundred sixty-five billion, three hundred twenty-four million, four hundred fifty-seven thousand, nine hundred eighty".