67681818676 has 12 divisors (see below), whose sum is σ = 119664247108. Its totient is φ = 33492033792.

The previous prime is 67681818661. The next prime is 67681818679.

67681818676 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 12492532900 + 55189285776 = 111770^2 + 234924^2 .

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67681818679) 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, 87218451 + ... + 87219226.

Almost surely, 2^67681818676 is an apocalyptic number.

It is an amenable number.

67681818676 is a deficient number, since it is larger than the sum of its proper divisors (51982428432).

67681818676 is a wasteful number, since it uses less digits than its factorization.

67681818676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174437778 (or 174437776 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 64.

The spelling of 67681818676 in words is "sixty-seven billion, six hundred eighty-one million, eight hundred eighteen thousand, six hundred seventy-six".