12661610 has 16 divisors (see below), whose sum is σ = 24544296. Its totient is φ = 4675008.

The previous prime is 12661591. The next prime is 12661613. The reversal of 12661610 is 1616621.

It can be written as a sum of positive squares in 4 ways, for example, as 11175649 + 1485961 = 3343^2 + 1219^2 .

It is not an unprimeable number, because it can be changed into a prime (12661613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48569 + ... + 48828.

Almost surely, 2^12661610 is an apocalyptic number.

12661610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12661610 is a deficient number, since it is larger than the sum of its proper divisors (11882686).

12661610 is a wasteful number, since it uses less digits than its factorization.

12661610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97417.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 12661610 is about 3558.3156127584. The cubic root of 12661610 is about 233.0753316071.

The spelling of 12661610 in words is "twelve million, six hundred sixty-one thousand, six hundred ten".