266438016 has 96 divisors (see below), whose sum is σ = 825726720. Its totient is φ = 81976320.

The previous prime is 266438009. The next prime is 266438023. The reversal of 266438016 is 610834662.

266438016 is a `hidden beast` number, since 2 + 6 + 643 + 8 + 0 + 1 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (266438009) and next prime (266438023).

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6081 + ... + 23871.

It is an arithmetic number, because the mean of its divisors is an integer number (8601320).

Almost surely, 2^266438016 is an apocalyptic number.

266438016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266438016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412863360).

266438016 is an abundant number, since it is smaller than the sum of its proper divisors (559288704).

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

266438016 is a wasteful number, since it uses less digits than its factorization.

266438016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17824 (or 17809 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 266438016 is about 16322.9291488997. The cubic root of 266438016 is about 643.4755706391.

The spelling of 266438016 in words is "two hundred sixty-six million, four hundred thirty-eight thousand, sixteen".