65423718666 has 48 divisors (see below), whose sum is σ = 149235559200. Its totient is φ = 20656858464.

The previous prime is 65423718649. The next prime is 65423718673. The reversal of 65423718666 is 66681732456.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (8709120) is a multiple of the sum of its prime divisors (30240).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3077325 + ... + 3098511.

It is an arithmetic number, because the mean of its divisors is an integer number (3109074150).

Almost surely, 2^65423718666 is an apocalyptic number.

65423718666 is an abundant number, since it is smaller than the sum of its proper divisors (83811840534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65423718666 is a wasteful number, since it uses less digits than its factorization.

65423718666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30243 (or 30240 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 65423718666 in words is "sixty-five billion, four hundred twenty-three million, seven hundred eighteen thousand, six hundred sixty-six".