216096660 has 240 divisors, whose sum is σ = 755876352. Its totient is φ = 51321600.

The previous prime is 216096659. The next prime is 216096667. The reversal of 216096660 is 66690612.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216096667) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 652695 + ... + 653025.

Almost surely, 2^216096660 is an apocalyptic number.

216096660 is a gapful number since it is divisible by the number (20) 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 216096660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377938176).

216096660 is an abundant number, since it is smaller than the sum of its proper divisors (539779692).

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

216096660 is a wasteful number, since it uses less digits than its factorization.

216096660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 216096660 is about 14700.2265288668. The cubic root of 216096660 is about 600.0894866529.

The spelling of 216096660 in words is "two hundred sixteen million, ninety-six thousand, six hundred sixty".