66365050523 has 4 divisors (see below), whose sum is σ = 66406298280. Its totient is φ = 66323802768.

The previous prime is 66365050501. The next prime is 66365050561. The reversal of 66365050523 is 32505056366.

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 66365050523 - 2³⁰ = 65291308699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66365056523) 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, 20621465 + ... + 20624682.

It is an arithmetic number, because the mean of its divisors is an integer number (16601574570).

Almost surely, 2^66365050523 is an apocalyptic number.

66365050523 is a deficient number, since it is larger than the sum of its proper divisors (41247757).

66365050523 is a wasteful number, since it uses less digits than its factorization.

66365050523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41247756.

The product of its (nonzero) digits is 486000, while the sum is 41.

The spelling of 66365050523 in words is "sixty-six billion, three hundred sixty-five million, fifty thousand, five hundred twenty-three".