2667689851 has 4 divisors (see below), whose sum is σ = 2808094600. Its totient is φ = 2527285104.

The previous prime is 2667689839. The next prime is 2667689911. The reversal of 2667689851 is 1589867662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1589867662 = 2 ⋅794933831.

It is a cyclic number.

It is not a de Polignac number, because 2667689851 - 2⁵ = 2667689819 is a prime.

It is a super-2 number, since 2×2667689851² = 14233138282256804402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2667689831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70202346 + ... + 70202383.

It is an arithmetic number, because the mean of its divisors is an integer number (702023650).

Almost surely, 2^2667689851 is an apocalyptic number.

2667689851 is a deficient number, since it is larger than the sum of its proper divisors (140404749).

2667689851 is a wasteful number, since it uses less digits than its factorization.

2667689851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140404748.

The product of its digits is 8709120, while the sum is 58.

The square root of 2667689851 is about 51649.6839390136. The cubic root of 2667689851 is about 1386.8998851205.

The spelling of 2667689851 in words is "two billion, six hundred sixty-seven million, six hundred eighty-nine thousand, eight hundred fifty-one".