266058216 has 128 divisors (see below), whose sum is σ = 784080000. Its totient is φ = 83358720.

The previous prime is 266058203. The next prime is 266058239. The reversal of 266058216 is 612850662.

266058216 is a `hidden beast` number, since 2 + 6 + 60 + 582 + 16 = 666.

It is a super-2 number, since 2×266058216² = 141573948602205312, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 988930 + ... + 989198.

It is an arithmetic number, because the mean of its divisors is an integer number (6125625).

Almost surely, 2^266058216 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 266058216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392040000).

266058216 is an abundant number, since it is smaller than the sum of its proper divisors (518021784).

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

266058216 is a wasteful number, since it uses less digits than its factorization.

266058216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 266058216 is about 16311.2910586501. The cubic root of 266058216 is about 643.1696730522.

The spelling of 266058216 in words is "two hundred sixty-six million, fifty-eight thousand, two hundred sixteen".