66511561106 has 16 divisors (see below), whose sum is σ = 102268863360. Its totient is φ = 32427201360.

The previous prime is 66511561057. The next prime is 66511561117. The reversal of 66511561106 is 60116511566.

It is a self number, because there is not a number n which added to its sum of digits gives 66511561106.

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, 1289900 + ... + 1340471.

It is an arithmetic number, because the mean of its divisors is an integer number (6391803960).

Almost surely, 2^66511561106 is an apocalyptic number.

66511561106 is a deficient number, since it is larger than the sum of its proper divisors (35757302254).

66511561106 is a wasteful number, since it uses less digits than its factorization.

66511561106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630689.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 66511561106 in words is "sixty-six billion, five hundred eleven million, five hundred sixty-one thousand, one hundred six".