12355666 has 8 divisors (see below), whose sum is σ = 18724860. Its totient is φ = 6114048.

The previous prime is 12355661. The next prime is 12355687. The reversal of 12355666 is 66655321.

It can be written as a sum of positive squares in 2 ways, for example, as 12355225 + 441 = 3515^2 + 21^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12355661) 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, 31651 + ... + 32038.

Almost surely, 2^12355666 is an apocalyptic number.

12355666 is a deficient number, since it is larger than the sum of its proper divisors (6369194).

12355666 is an equidigital number, since it uses as much as digits as its factorization.

12355666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63788.

The product of its digits is 32400, while the sum is 34.

The square root of 12355666 is about 3515.0627305924. The cubic root of 12355666 is about 231.1827293006.

The spelling of 12355666 in words is "twelve million, three hundred fifty-five thousand, six hundred sixty-six".