12666090 has 16 divisors (see below), whose sum is σ = 30398688. Its totient is φ = 3377616.

The previous prime is 12666083. The next prime is 12666131. The reversal of 12666090 is 9066621.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 422203 = 12666090 / (1 + 2 + 6 + 6 + 6 + 0 + 9 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211072 + ... + 211131.

It is an arithmetic number, because the mean of its divisors is an integer number (1899918).

Almost surely, 2^12666090 is an apocalyptic number.

12666090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12666090 is an abundant number, since it is smaller than the sum of its proper divisors (17732598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12666090 is a wasteful number, since it uses less digits than its factorization.

12666090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422213.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 12666090 is about 3558.9450684156. The cubic root of 12666090 is about 233.1028176945.

The spelling of 12666090 in words is "twelve million, six hundred sixty-six thousand, ninety".