266629888 has 144 divisors (see below), whose sum is σ = 659312640. Its totient is φ = 105062400.

The previous prime is 266629879. The next prime is 266629889. The reversal of 266629888 is 888926662.

It is not an unprimeable number, because it can be changed into a prime (266629889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1395873 + ... + 1396063.

It is an arithmetic number, because the mean of its divisors is an integer number (4578560).

Almost surely, 2^266629888 is an apocalyptic number.

266629888 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 266629888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329656320).

266629888 is an abundant number, since it is smaller than the sum of its proper divisors (392682752).

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

266629888 is a wasteful number, since it uses less digits than its factorization.

266629888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 260 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 55.

The square root of 266629888 is about 16328.8054676391. The cubic root of 266629888 is about 643.6299971997.

The spelling of 266629888 in words is "two hundred sixty-six million, six hundred twenty-nine thousand, eight hundred eighty-eight".