3336666681 has 4 divisors (see below), whose sum is σ = 4448888912. Its totient is φ = 2224444452.

The previous prime is 3336666667. The next prime is 3336666691. The reversal of 3336666681 is 1866666333.

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 not a de Polignac number, because 3336666681 - 2⁹ = 3336666169 is a prime.

It is a super-2 number, since 2×3336666681² = 22266689080191111522, which 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 3336666681.

It is not an unprimeable number, because it can be changed into a prime (3336666661) 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, 556111111 + ... + 556111116.

It is an arithmetic number, because the mean of its divisors is an integer number (1112222228).

Almost surely, 2^3336666681 is an apocalyptic number.

It is an amenable number.

3336666681 is a deficient number, since it is larger than the sum of its proper divisors (1112222231).

3336666681 is a wasteful number, since it uses less digits than its factorization.

3336666681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112222230.

The product of its digits is 1679616, while the sum is 48.

The square root of 3336666681 is about 57763.8873432182. The cubic root of 3336666681 is about 1494.2993523003.

The spelling of 3336666681 in words is "three billion, three hundred thirty-six million, six hundred sixty-six thousand, six hundred eighty-one".