266143416 has 128 divisors (see below), whose sum is σ = 840499200. Its totient is φ = 68215680.

The previous prime is 266143379. The next prime is 266143421. The reversal of 266143416 is 614341662.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145081 + ... + 146903.

It is an arithmetic number, because the mean of its divisors is an integer number (6566400).

Almost surely, 2^266143416 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 266143416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420249600).

266143416 is an abundant number, since it is smaller than the sum of its proper divisors (574355784).

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

266143416 is a wasteful number, since it uses less digits than its factorization.

266143416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929 (or 1925 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 266143416 is about 16313.9025374066. The cubic root of 266143416 is about 643.2383199429.

The spelling of 266143416 in words is "two hundred sixty-six million, one hundred forty-three thousand, four hundred sixteen".