12003660 has 48 divisors (see below), whose sum is σ = 37346400. Its totient is φ = 3200832.

The previous prime is 12003647. The next prime is 12003671. The reversal of 12003660 is 6630021.

It is a happy number.

12003660 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 3 + 660 = 666.

12003660 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10575 + ... + 11654.

It is an arithmetic number, because the mean of its divisors is an integer number (778050).

Almost surely, 2^12003660 is an apocalyptic number.

12003660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12003660 is an abundant number, since it is smaller than the sum of its proper divisors (25342740).

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

12003660 is a wasteful number, since it uses less digits than its factorization.

12003660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22247 (or 22239 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 12003660 is about 3464.6298503592. The cubic root of 12003660 is about 228.9661220010.

Adding to 12003660 its reverse (6630021), we get a palindrome (18633681).

The spelling of 12003660 in words is "twelve million, three thousand, six hundred sixty".