12667997381 has 8 divisors (see below), whose sum is σ = 13644852480. Its totient is φ = 11691484272.

The previous prime is 12667997371. The next prime is 12667997383. The reversal of 12667997381 is 18379976621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12667997381 - 2¹⁰ = 12667996357 is a prime.

It is a super-2 number, since 2×12667997381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12667997381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12667997383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5801 + ... + 159278.

It is an arithmetic number, because the mean of its divisors is an integer number (1705606560).

Almost surely, 2^12667997381 is an apocalyptic number.

It is an amenable number.

12667997381 is a deficient number, since it is larger than the sum of its proper divisors (976855099).

12667997381 is a wasteful number, since it uses less digits than its factorization.

12667997381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170995.

The product of its digits is 6858432, while the sum is 59.

The spelling of 12667997381 in words is "twelve billion, six hundred sixty-seven million, nine hundred ninety-seven thousand, three hundred eighty-one".