10667071921 has 4 divisors (see below), whose sum is σ = 11636805744. Its totient is φ = 9697338100.

The previous prime is 10667071907. The next prime is 10667071931. The reversal of 10667071921 is 12917076601.

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 a cyclic number.

It is not a de Polignac number, because 10667071921 - 2¹¹ = 10667069873 is a prime.

It is a super-2 number, since 2×10667071921² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10667071901) 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, 484866895 + ... + 484866916.

It is an arithmetic number, because the mean of its divisors is an integer number (2909201436).

Almost surely, 2^10667071921 is an apocalyptic number.

10667071921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10667071921 is a deficient number, since it is larger than the sum of its proper divisors (969733823).

10667071921 is an equidigital number, since it uses as much as digits as its factorization.

10667071921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969733822.

The product of its (nonzero) digits is 31752, while the sum is 40.

The spelling of 10667071921 in words is "ten billion, six hundred sixty-seven million, seventy-one thousand, nine hundred twenty-one".