67216266 has 96 divisors (see below), whose sum is σ = 169395408. Its totient is φ = 19077120.

The previous prime is 67216213. The next prime is 67216273. The reversal of 67216266 is 66261276.

67216266 is a `hidden beast` number, since 6 + 7 + 21 + 626 + 6 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 4347225 + 62869041 = 2085^2 + 7929^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 67216266.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 242520 + ... + 242796.

Almost surely, 2^67216266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67216266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84697704).

67216266 is an abundant number, since it is smaller than the sum of its proper divisors (102179142).

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

67216266 is a wasteful number, since it uses less digits than its factorization.

67216266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 373 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 67216266 is about 8198.5526771498. The cubic root of 67216266 is about 406.5913430620.

The spelling of 67216266 in words is "sixty-seven million, two hundred sixteen thousand, two hundred sixty-six".