12664847 has 12 divisors (see below), whose sum is σ = 14492856. Its totient is φ = 10999680.

The previous prime is 12664829. The next prime is 12664871. The reversal of 12664847 is 74846621.

It is not a de Polignac number, because 12664847 - 2²² = 8470543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12664847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2072 + ... + 5442.

It is an arithmetic number, because the mean of its divisors is an integer number (1207738).

Almost surely, 2^12664847 is an apocalyptic number.

12664847 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12664847 is a deficient number, since it is larger than the sum of its proper divisors (1828009).

12664847 is a wasteful number, since it uses less digits than its factorization.

12664847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418 (or 3401 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 12664847 is about 3558.7704337313. The cubic root of 12664847 is about 233.0951921820.

The spelling of 12664847 in words is "twelve million, six hundred sixty-four thousand, eight hundred forty-seven".