216661060 has 48 divisors (see below), whose sum is σ = 567262080. Its totient is φ = 67530240.

The previous prime is 216661033. The next prime is 216661087. The reversal of 216661060 is 60166612.

It is an interprime number because it is at equal distance from previous prime (216661033) and next prime (216661087).

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

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, 68805 + ... + 71884.

It is an arithmetic number, because the mean of its divisors is an integer number (11817960).

Almost surely, 2^216661060 is an apocalyptic number.

216661060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216661060 is an abundant number, since it is smaller than the sum of its proper divisors (350601020).

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

216661060 is a wasteful number, since it uses less digits than its factorization.

216661060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140716 (or 140714 counting only the distinct ones).

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

The square root of 216661060 is about 14719.4109936505. The cubic root of 216661060 is about 600.6114692232.

The spelling of 216661060 in words is "two hundred sixteen million, six hundred sixty-one thousand, sixty".