4678067666681 has 4 divisors (see below), whose sum is σ = 4678104327012. Its totient is φ = 4678031006352.

The previous prime is 4678067666641. The next prime is 4678067666683. The reversal of 4678067666681 is 1866667608764.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3282619240000 + 1395448426681 = 1811800^2 + 1181291^2 .

It is a cyclic number.

It is not a de Polignac number, because 4678067666681 - 2⁶ = 4678067666617 is a prime.

It is a super-2 number, since 2×4678067666681² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4678067666683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18138086 + ... + 18394191.

It is an arithmetic number, because the mean of its divisors is an integer number (1169526081753).

Almost surely, 2^{4678067666681} is an apocalyptic number.

It is an amenable number.

4678067666681 is a deficient number, since it is larger than the sum of its proper divisors (36660331).

4678067666681 is a wasteful number, since it uses less digits than its factorization.

4678067666681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36660330.

The product of its (nonzero) digits is 585252864, while the sum is 71.

The spelling of 4678067666681 in words is "four trillion, six hundred seventy-eight billion, sixty-seven million, six hundred sixty-six thousand, six hundred eighty-one".