2667689381 has 16 divisors (see below), whose sum is σ = 3239168640. Its totient is φ = 2148068160.

The previous prime is 2667689359. The next prime is 2667689383. The reversal of 2667689381 is 1839867662.

2667689381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2667689381 - 2¹⁰ = 2667688357 is a prime.

It is a super-2 number, since 2×2667689381² = 14233133267000326322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2667689383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170075 + ... + 185096.

It is an arithmetic number, because the mean of its divisors is an integer number (202448040).

Almost surely, 2^2667689381 is an apocalyptic number.

It is an amenable number.

2667689381 is a deficient number, since it is larger than the sum of its proper divisors (571479259).

2667689381 is a wasteful number, since it uses less digits than its factorization.

2667689381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355244.

The product of its digits is 5225472, while the sum is 56.

The square root of 2667689381 is about 51649.6793891308. The cubic root of 2667689381 is about 1386.8998036714.

The spelling of 2667689381 in words is "two billion, six hundred sixty-seven million, six hundred eighty-nine thousand, three hundred eighty-one".