66165623383 has 4 divisors (see below), whose sum is σ = 66191162688. Its totient is φ = 66140084080.

The previous prime is 66165623327. The next prime is 66165623399. The reversal of 66165623383 is 38332656166.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66165623383 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66165623683) 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, 12765766 + ... + 12770947.

It is an arithmetic number, because the mean of its divisors is an integer number (16547790672).

Almost surely, 2^66165623383 is an apocalyptic number.

66165623383 is a deficient number, since it is larger than the sum of its proper divisors (25539305).

66165623383 is a wasteful number, since it uses less digits than its factorization.

66165623383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25539304.

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

The spelling of 66165623383 in words is "sixty-six billion, one hundred sixty-five million, six hundred twenty-three thousand, three hundred eighty-three".