66557722883 has 4 divisors (see below), whose sum is σ = 67551121800. Its totient is φ = 65564323968.

The previous prime is 66557722877. The next prime is 66557723047. The reversal of 66557722883 is 38822775566.

It is a happy number.

66557722883 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, and also an emirpimes, since its reverse is a distinct semiprime: 38822775566 = 2 ⋅19411387783.

It is a cyclic number.

It is not a de Polignac number, because 66557722883 - 2⁴ = 66557722867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66557722853) 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, 496699358 + ... + 496699491.

It is an arithmetic number, because the mean of its divisors is an integer number (16887780450).

Almost surely, 2^66557722883 is an apocalyptic number.

66557722883 is a deficient number, since it is larger than the sum of its proper divisors (993398917).

66557722883 is an equidigital number, since it uses as much as digits as its factorization.

66557722883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993398916.

The product of its digits is 33868800, while the sum is 59.

The spelling of 66557722883 in words is "sixty-six billion, five hundred fifty-seven million, seven hundred twenty-two thousand, eight hundred eighty-three".