266611968 has 216 divisors, whose sum is σ = 896220416. Its totient is φ = 74649600.

The previous prime is 266611913. The next prime is 266612069. The reversal of 266611968 is 869116662.

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 23 ways as a sum of consecutive naturals, for example, 983673 + ... + 983943.

Almost surely, 2^266611968 is an apocalyptic number.

266611968 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 266611968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448110208).

266611968 is an abundant number, since it is smaller than the sum of its proper divisors (629608448).

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

266611968 is a wasteful number, since it uses less digits than its factorization.

266611968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 344 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 266611968 is about 16328.2567348753. The cubic root of 266611968 is about 643.6155775760.

The spelling of 266611968 in words is "two hundred sixty-six million, six hundred eleven thousand, nine hundred sixty-eight".