266517216 has 240 divisors, whose sum is σ = 922322016. Its totient is φ = 73903104.

The previous prime is 266517203. The next prime is 266517227. The reversal of 266517216 is 612715662.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 671130 + ... + 671526.

Almost surely, 2^266517216 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 266517216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461161008).

266517216 is an abundant number, since it is smaller than the sum of its proper divisors (655804800).

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

266517216 is a wasteful number, since it uses less digits than its factorization.

266517216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 446 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 266517216 is about 16325.3550037970. The cubic root of 266517216 is about 643.5393230734.

It can be divided in two parts, 2665 and 17216, that added together give a square (19881 = 141²).

The spelling of 266517216 in words is "two hundred sixty-six million, five hundred seventeen thousand, two hundred sixteen".