66133365826 has 16 divisors (see below), whose sum is σ = 109008154080. Its totient is φ = 29841198880.

The previous prime is 66133365791. The next prime is 66133365829. The reversal of 66133365826 is 62856333166.

66133365826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 66133365826.

It is not an unprimeable number, because it can be changed into a prime (66133365829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10968016 + ... + 10974043.

It is an arithmetic number, because the mean of its divisors is an integer number (6813009630).

Almost surely, 2^66133365826 is an apocalyptic number.

66133365826 is a deficient number, since it is larger than the sum of its proper divisors (42874788254).

66133365826 is a wasteful number, since it uses less digits than its factorization.

66133365826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21942209.

The product of its digits is 2799360, while the sum is 49.

The spelling of 66133365826 in words is "sixty-six billion, one hundred thirty-three million, three hundred sixty-five thousand, eight hundred twenty-six".