66883164769 has 4 divisors (see below), whose sum is σ = 66944470320. Its totient is φ = 66821859220.

The previous prime is 66883164749. The next prime is 66883164833. The reversal of 66883164769 is 96746138866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66883164769 - 2⁷ = 66883164641 is a prime.

It is a super-2 number, since 2×66883164769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66883164769.

It is not an unprimeable number, because it can be changed into a prime (66883164749) 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, 30651139 + ... + 30653320.

It is an arithmetic number, because the mean of its divisors is an integer number (16736117580).

Almost surely, 2^66883164769 is an apocalyptic number.

It is an amenable number.

66883164769 is a deficient number, since it is larger than the sum of its proper divisors (61305551).

66883164769 is a wasteful number, since it uses less digits than its factorization.

66883164769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61305550.

The product of its digits is 62705664, while the sum is 64.

The spelling of 66883164769 in words is "sixty-six billion, eight hundred eighty-three million, one hundred sixty-four thousand, seven hundred sixty-nine".