12601666 has 48 divisors (see below), whose sum is σ = 24437952. Its totient is φ = 4767840.

The previous prime is 12601663. The next prime is 12601691. The reversal of 12601666 is 66610621.

It is not an unprimeable number, because it can be changed into a prime (12601663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72756 + ... + 72928.

It is an arithmetic number, because the mean of its divisors is an integer number (509124).

Almost surely, 2^12601666 is an apocalyptic number.

12601666 is a deficient number, since it is larger than the sum of its proper divisors (11836286).

12601666 is a wasteful number, since it uses less digits than its factorization.

12601666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 12601666 is about 3549.8825332678. The cubic root of 12601666 is about 232.7069325837.

It can be divided in two parts, 1260 and 1666, that added together give a triangular number (2926 = T₇₆).

The spelling of 12601666 in words is "twelve million, six hundred one thousand, six hundred sixty-six".