66746887911 has 24 divisors (see below), whose sum is σ = 105519558144. Its totient is φ = 40320873360.

The previous prime is 66746887871. The next prime is 66746887913. The reversal of 66746887911 is 11978864766.

66746887911 is a `hidden beast` number, since 6 + 6 + 7 + 468 + 87 + 91 + 1 = 666.

It is not a de Polignac number, because 66746887911 - 2¹⁰ = 66746886887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66746887913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1067671 + ... + 1128456.

It is an arithmetic number, because the mean of its divisors is an integer number (4396648256).

Almost surely, 2^66746887911 is an apocalyptic number.

66746887911 is a deficient number, since it is larger than the sum of its proper divisors (38772670233).

66746887911 is a wasteful number, since it uses less digits than its factorization.

66746887911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196451 (or 2196448 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The spelling of 66746887911 in words is "sixty-six billion, seven hundred forty-six million, eight hundred eighty-seven thousand, nine hundred eleven".