1216660204 has 12 divisors (see below), whose sum is σ = 2129425200. Its totient is φ = 608253008.

The previous prime is 1216660201. The next prime is 1216660213. The reversal of 1216660204 is 4020666121.

It is not an unprimeable number, because it can be changed into a prime (1216660201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30537 + ... + 58015.

It is an arithmetic number, because the mean of its divisors is an integer number (177452100).

Almost surely, 2^1216660204 is an apocalyptic number.

It is an amenable number.

1216660204 is a deficient number, since it is larger than the sum of its proper divisors (912764996).

1216660204 is a wasteful number, since it uses less digits than its factorization.

1216660204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38552 (or 38550 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1216660204 is about 34880.6565878568. The cubic root of 1216660204 is about 1067.5537922424.

The spelling of 1216660204 in words is "one billion, two hundred sixteen million, six hundred sixty thousand, two hundred four".