266746216 has 32 divisors (see below), whose sum is σ = 548664480. Its totient is φ = 120571200.

The previous prime is 266746189. The next prime is 266746253. The reversal of 266746216 is 612647662.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7555 + ... + 24301.

It is an arithmetic number, because the mean of its divisors is an integer number (17145765).

Almost surely, 2^266746216 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 266746216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274332240).

266746216 is an abundant number, since it is smaller than the sum of its proper divisors (281918264).

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

266746216 is a wasteful number, since it uses less digits than its factorization.

266746216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16945 (or 16941 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 266746216 is about 16332.3671278844. The cubic root of 266746216 is about 643.7235867379.

The spelling of 266746216 in words is "two hundred sixty-six million, seven hundred forty-six thousand, two hundred sixteen".