42066216 has 56 divisors (see below), whose sum is σ = 118273530. Its totient is φ = 14020128.

The previous prime is 42066203. The next prime is 42066223. The reversal of 42066216 is 61266024.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29746116 + 12320100 = 5454^2 + 3510^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 42066216.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 2226 + ... + 9438.

Almost surely, 2^42066216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42066216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59136765).

42066216 is an abundant number, since it is smaller than the sum of its proper divisors (76207314).

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

42066216 is an equidigital number, since it uses as much as digits as its factorization.

42066216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7237 (or 7218 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 42066216 is about 6485.8473617562. The cubic root of 42066216 is about 347.7852420498.

The spelling of 42066216 in words is "forty-two million, sixty-six thousand, two hundred sixteen".