66736803911 has 4 divisors (see below), whose sum is σ = 68540501352. Its totient is φ = 64933106472.

The previous prime is 66736803901. The next prime is 66736803941. The reversal of 66736803911 is 11930863766.

66736803911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66736803911 - 2¹⁰ = 66736802887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66736803911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66736803901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901848665 + ... + 901848738.

It is an arithmetic number, because the mean of its divisors is an integer number (17135125338).

Almost surely, 2^66736803911 is an apocalyptic number.

66736803911 is a deficient number, since it is larger than the sum of its proper divisors (1803697441).

66736803911 is a wasteful number, since it uses less digits than its factorization.

66736803911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803697440.

The product of its (nonzero) digits is 979776, while the sum is 50.

The spelling of 66736803911 in words is "sixty-six billion, seven hundred thirty-six million, eight hundred three thousand, nine hundred eleven".