1325206013666 has 32 divisors (see below), whose sum is σ = 2076935218176. Its totient is φ = 633462120000.

The previous prime is 1325206013633. The next prime is 1325206013671. The reversal of 1325206013666 is 6663106025231.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303496 + ... + 2085548.

It is an arithmetic number, because the mean of its divisors is an integer number (64904225568).

Almost surely, 2^{1325206013666} is an apocalyptic number.

1325206013666 is a deficient number, since it is larger than the sum of its proper divisors (751729204510).

1325206013666 is a wasteful number, since it uses less digits than its factorization.

1325206013666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782418.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 1325206013666 in words is "one trillion, three hundred twenty-five billion, two hundred six million, thirteen thousand, six hundred sixty-six".