66744711 has 12 divisors (see below), whose sum is σ = 105173640. Its totient is φ = 40451280.

The previous prime is 66744697. The next prime is 66744719. The reversal of 66744711 is 11744766.

It is not a de Polignac number, because 66744711 - 2⁶ = 66744647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66744719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336996 + ... + 337193.

It is an arithmetic number, because the mean of its divisors is an integer number (8764470).

Almost surely, 2^66744711 is an apocalyptic number.

66744711 is a deficient number, since it is larger than the sum of its proper divisors (38428929).

66744711 is a wasteful number, since it uses less digits than its factorization.

66744711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674206 (or 674203 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 66744711 is about 8169.7436312286. The cubic root of 66744711 is about 405.6382984680.

Subtracting from 66744711 its reverse (11744766), we obtain a palindrome (54999945).

The spelling of 66744711 in words is "sixty-six million, seven hundred forty-four thousand, seven hundred eleven".