266180416 has 56 divisors (see below), whose sum is σ = 544388040. Its totient is φ = 129073152.

The previous prime is 266180401. The next prime is 266180423. The reversal of 266180416 is 614081662.

It can be written as a sum of positive squares in 4 ways, for example, as 109830400 + 156350016 = 10480^2 + 12504^2 .

It is a nialpdrome in base 16.

It is a congruent number.

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, 328620 + ... + 329428.

It is an arithmetic number, because the mean of its divisors is an integer number (9721215).

Almost surely, 2^266180416 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 266180416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272194020).

266180416 is an abundant number, since it is smaller than the sum of its proper divisors (278207624).

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

266180416 is an equidigital number, since it uses as much as digits as its factorization.

266180416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 266180416 is about 16315.0365001124. The cubic root of 266180416 is about 643.2681268234.

The spelling of 266180416 in words is "two hundred sixty-six million, one hundred eighty thousand, four hundred sixteen".