6667278961281 has 16 divisors (see below), whose sum is σ = 8903375587200. Its totient is φ = 4438018286208.

The previous prime is 6667278961279. The next prime is 6667278961313. The reversal of 6667278961281 is 1821698727666.

It is not a de Polignac number, because 6667278961281 - 2¹ = 6667278961279 is a prime.

It is a super-2 number, since 2×6667278961281² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6667278961201) 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, 36810900 + ... + 36991578.

It is an arithmetic number, because the mean of its divisors is an integer number (556460974200).

Almost surely, 2^{6667278961281} is an apocalyptic number.

It is an amenable number.

6667278961281 is a deficient number, since it is larger than the sum of its proper divisors (2236096625919).

6667278961281 is a wasteful number, since it uses less digits than its factorization.

6667278961281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199528.

The product of its digits is 146313216, while the sum is 69.

The spelling of 6667278961281 in words is "six trillion, six hundred sixty-seven billion, two hundred seventy-eight million, nine hundred sixty-one thousand, two hundred eighty-one".