660991199066 has 8 divisors (see below), whose sum is σ = 1081621962144. Its totient is φ = 300450545020.

The previous prime is 660991199059. The next prime is 660991199081.

660991199066 is nontrivially palindromic in base 10.

660991199066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15022527230 + ... + 15022527273.

It is an arithmetic number, because the mean of its divisors is an integer number (135202745268).

Almost surely, 2^660991199066 is an apocalyptic number.

660991199066 is a deficient number, since it is larger than the sum of its proper divisors (420630763078).

660991199066 is a wasteful number, since it uses less digits than its factorization.

660991199066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30045054516.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The spelling of 660991199066 in words is "six hundred sixty billion, nine hundred ninety-one million, one hundred ninety-nine thousand, sixty-six".