12870666 has 24 divisors (see below), whose sum is σ = 29527524. Its totient is φ = 4037760.

The previous prime is 12870661. The next prime is 12870691. The reversal of 12870666 is 66607821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9790641 + 3080025 = 3129^2 + 1755^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12870666.

It is not an unprimeable number, because it can be changed into a prime (12870661) 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, 20725 + ... + 21336.

Almost surely, 2^12870666 is an apocalyptic number.

12870666 is an abundant number, since it is smaller than the sum of its proper divisors (16656858).

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

12870666 is a wasteful number, since it uses less digits than its factorization.

12870666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42086 (or 42083 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 12870666 is about 3587.5710445927. The cubic root of 12870666 is about 234.3511056174.

The spelling of 12870666 in words is "twelve million, eight hundred seventy thousand, six hundred sixty-six".