12224666691 has 20 divisors (see below), whose sum is σ = 18268990432. Its totient is φ = 8146452528.

The previous prime is 12224666617. The next prime is 12224666749. The reversal of 12224666691 is 19666642221.

It is not a de Polignac number, because 12224666691 - 2²³ = 12216278083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12224666491) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 177606 + ... + 236628.

Almost surely, 2^12224666691 is an apocalyptic number.

12224666691 is a deficient number, since it is larger than the sum of its proper divisors (6044323741).

12224666691 is an equidigital number, since it uses as much as digits as its factorization.

12224666691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61592 (or 61583 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The spelling of 12224666691 in words is "twelve billion, two hundred twenty-four million, six hundred sixty-six thousand, six hundred ninety-one".