166611120506 has 16 divisors (see below), whose sum is σ = 256040543808. Its totient is φ = 81264722400.

The previous prime is 166611120469. The next prime is 166611120521. The reversal of 166611120506 is 605021116661.

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, 665621 + ... + 881063.

It is an arithmetic number, because the mean of its divisors is an integer number (16002533988).

Almost surely, 2^166611120506 is an apocalyptic number.

166611120506 is a deficient number, since it is larger than the sum of its proper divisors (89429423302).

166611120506 is a wasteful number, since it uses less digits than its factorization.

166611120506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224917.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 166611120506 in words is "one hundred sixty-six billion, six hundred eleven million, one hundred twenty thousand, five hundred six".