266661376 has 40 divisors (see below), whose sum is σ = 545840064. Its totient is φ = 130068480.

The previous prime is 266661341. The next prime is 266661377. The reversal of 266661376 is 673166662.

266661376 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×266661376² = 142216578900426752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266661377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14641 + ... + 27343.

Almost surely, 2^266661376 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 266661376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272920032).

266661376 is an abundant number, since it is smaller than the sum of its proper divisors (279178688).

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

266661376 is an equidigital number, since it uses as much as digits as its factorization.

266661376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12762 (or 12746 counting only the distinct ones).

The product of its digits is 326592, while the sum is 43.

The square root of 266661376 is about 16329.7696248294. The cubic root of 266661376 is about 643.6553329735.

It can be divided in two parts, 2666613 and 76, that added together give a square (2666689 = 1633²).

The spelling of 266661376 in words is "two hundred sixty-six million, six hundred sixty-one thousand, three hundred seventy-six".