266642416 has 40 divisors (see below), whose sum is σ = 549138960. Its totient is φ = 124990464.

The previous prime is 266642413. The next prime is 266642419. The reversal of 266642416 is 614246662.

266642416 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (266642413) and next prime (266642419).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266642413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73575 + ... + 77113.

It is an arithmetic number, because the mean of its divisors is an integer number (13728474).

Almost surely, 2^266642416 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 266642416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274569480).

266642416 is an abundant number, since it is smaller than the sum of its proper divisors (282496544).

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

266642416 is a wasteful number, since it uses less digits than its factorization.

266642416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3841 (or 3835 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 266642416 is about 16329.1890796818. The cubic root of 266642416 is about 643.6400776779.

The spelling of 266642416 in words is "two hundred sixty-six million, six hundred forty-two thousand, four hundred sixteen".