66881334867 has 8 divisors (see below), whose sum is σ = 89186457024. Its totient is φ = 44581884648.

The previous prime is 66881334859. The next prime is 66881334901. The reversal of 66881334867 is 76843318866.

66881334867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66881334867 - 2³ = 66881334859 is a prime.

It is a super-2 number, since 2×66881334867² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 66881334867.

It is not an unprimeable number, because it can be changed into a prime (66881334827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1390393 + ... + 1437690.

It is an arithmetic number, because the mean of its divisors is an integer number (11148307128).

Almost surely, 2^66881334867 is an apocalyptic number.

66881334867 is a deficient number, since it is larger than the sum of its proper divisors (22305122157).

66881334867 is a wasteful number, since it uses less digits than its factorization.

66881334867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835969.

The product of its digits is 27869184, while the sum is 60.

The spelling of 66881334867 in words is "sixty-six billion, eight hundred eighty-one million, three hundred thirty-four thousand, eight hundred sixty-seven".