1328620006660 has 48 divisors (see below), whose sum is σ = 2855647872000. Its totient is φ = 519012141440.

The previous prime is 1328620006607. The next prime is 1328620006669. The reversal of 1328620006660 is 666000268231.

It is a happy number.

It is a super-2 number, since 2×1328620006660² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1328620006669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1099660 + ... + 1966339.

It is an arithmetic number, because the mean of its divisors is an integer number (59492664000).

Almost surely, 2^{1328620006660} is an apocalyptic number.

1328620006660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1328620006660 is an abundant number, since it is smaller than the sum of its proper divisors (1527027865340).

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

1328620006660 is a wasteful number, since it uses less digits than its factorization.

1328620006660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3066516 (or 3066514 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 1328620006660 in words is "one trillion, three hundred twenty-eight billion, six hundred twenty million, six thousand, six hundred sixty".