12664074527 has 4 divisors (see below), whose sum is σ = 13638234120. Its totient is φ = 11689914936.

The previous prime is 12664074509. The next prime is 12664074569. The reversal of 12664074527 is 72547046621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12664074527 - 2¹⁰ = 12664073503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664074587) 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, 487079777 + ... + 487079802.

It is an arithmetic number, because the mean of its divisors is an integer number (3409558530).

Almost surely, 2^12664074527 is an apocalyptic number.

12664074527 is a deficient number, since it is larger than the sum of its proper divisors (974159593).

12664074527 is an equidigital number, since it uses as much as digits as its factorization.

12664074527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974159592.

The product of its (nonzero) digits is 564480, while the sum is 44.

The spelling of 12664074527 in words is "twelve billion, six hundred sixty-four million, seventy-four thousand, five hundred twenty-seven".