12660100 has 18 divisors (see below), whose sum is σ = 27472634. Its totient is φ = 5064000.

The previous prime is 12660091. The next prime is 12660101. The reversal of 12660100 is 106621.

It can be written as a sum of positive squares in 3 ways, for example, as 3755844 + 8904256 = 1938^2 + 2984^2 .

It is not an unprimeable number, because it can be changed into a prime (12660101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63201 + ... + 63400.

Almost surely, 2^12660100 is an apocalyptic number.

12660100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12660100 is an abundant number, since it is smaller than the sum of its proper divisors (14812534).

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

12660100 is a wasteful number, since it uses less digits than its factorization.

12660100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126615 (or 126608 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 12660100 is about 3558.1034273894. The cubic root of 12660100 is about 233.0660658623.

Adding to 12660100 its reverse (106621), we get a palindrome (12766721).

The spelling of 12660100 in words is "twelve million, six hundred sixty thousand, one hundred".