266889168 has 400 divisors, whose sum is σ = 994825216. Its totient is φ = 67184640.

The previous prime is 266889127. The next prime is 266889193. The reversal of 266889168 is 861988662.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

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

Its product of digits (1990656) is a multiple of the sum of its prime factors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3655980 + ... + 3656052.

Almost surely, 2^266889168 is an apocalyptic number.

266889168 is a gapful number since it is divisible by the number (28) 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 266889168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497412608).

266889168 is an abundant number, since it is smaller than the sum of its proper divisors (727936048).

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

266889168 is a wasteful number, since it uses less digits than its factorization.

266889168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 129 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 266889168 is about 16336.7428822272. The cubic root of 266889168 is about 643.8385588664.

The spelling of 266889168 in words is "two hundred sixty-six million, eight hundred eighty-nine thousand, one hundred sixty-eight".