216669000 has 64 divisors (see below), whose sum is σ = 676016640. Its totient is φ = 57777600.

The previous prime is 216668999. The next prime is 216669007. The reversal of 216669000 is 966612.

It is a super-2 number, since 2×216669000² = 93890911122000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216669007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33112 + ... + 39111.

It is an arithmetic number, because the mean of its divisors is an integer number (10562760).

Almost surely, 2^216669000 is an apocalyptic number.

216669000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216669000 is an abundant number, since it is smaller than the sum of its proper divisors (459347640).

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

216669000 is a wasteful number, since it uses less digits than its factorization.

216669000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72247 (or 72233 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 216669000 is about 14719.6807030587. The cubic root of 216669000 is about 600.6188060236.

The spelling of 216669000 in words is "two hundred sixteen million, six hundred sixty-nine thousand".