12664730 has 32 divisors (see below), whose sum is σ = 25223184. Its totient is φ = 4548096.

The previous prime is 12664723. The next prime is 12664733. The reversal of 12664730 is 3746621.

It can be written as a sum of positive squares in 8 ways, for example, as 3598609 + 9066121 = 1897^2 + 3011^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12664693 and 12664702.

It is not an unprimeable number, because it can be changed into a prime (12664733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3494 + ... + 6126.

Almost surely, 2^12664730 is an apocalyptic number.

12664730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12664730 is a deficient number, since it is larger than the sum of its proper divisors (12558454).

12664730 is a wasteful number, since it uses less digits than its factorization.

12664730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 12664730 is about 3558.7539954315. The cubic root of 12664730 is about 233.0944743889.

The spelling of 12664730 in words is "twelve million, six hundred sixty-four thousand, seven hundred thirty".