66511967110 has 16 divisors (see below), whose sum is σ = 119861254656. Its totient is φ = 26573739328.

The previous prime is 66511967087. The next prime is 66511967113. The reversal of 66511967110 is 1176911566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66511967113) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3871942 + ... + 3889081.

It is an arithmetic number, because the mean of its divisors is an integer number (7491328416).

Almost surely, 2^66511967110 is an apocalyptic number.

66511967110 is a deficient number, since it is larger than the sum of its proper divisors (53349287546).

66511967110 is a wasteful number, since it uses less digits than its factorization.

66511967110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7761887.

The product of its (nonzero) digits is 68040, while the sum is 43.

The spelling of 66511967110 in words is "sixty-six billion, five hundred eleven million, nine hundred sixty-seven thousand, one hundred ten".