1216660060 has 192 divisors, whose sum is σ = 3434618880. Its totient is φ = 350542080.

The previous prime is 1216660057. The next prime is 1216660111. The reversal of 1216660060 is 600666121.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1257697 + ... + 1258663.

It is an arithmetic number, because the mean of its divisors is an integer number (17888640).

Almost surely, 2^1216660060 is an apocalyptic number.

1216660060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216660060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1717309440).

1216660060 is an abundant number, since it is smaller than the sum of its proper divisors (2217958820).

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

1216660060 is a wasteful number, since it uses less digits than its factorization.

1216660060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1054 counting only the distinct ones).

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

The square root of 1216660060 is about 34880.6545236754. The cubic root of 1216660060 is about 1067.5537501250.

The spelling of 1216660060 in words is "one billion, two hundred sixteen million, six hundred sixty thousand, sixty".