266974920 has 128 divisors (see below), whose sum is σ = 895536000. Its totient is φ = 70744320.

The previous prime is 266974913. The next prime is 266974921. The reversal of 266974920 is 29479662.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (266974921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192630 + ... + 194010.

It is an arithmetic number, because the mean of its divisors is an integer number (6996375).

Almost surely, 2^266974920 is an apocalyptic number.

266974920 is a gapful number since it is divisible by the number (20) 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 266974920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (447768000).

266974920 is an abundant number, since it is smaller than the sum of its proper divisors (628561080).

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

266974920 is a wasteful number, since it uses less digits than its factorization.

266974920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580 (or 1570 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 266974920 is about 16339.3671848086. The cubic root of 266974920 is about 643.9075070025.

The spelling of 266974920 in words is "two hundred sixty-six million, nine hundred seventy-four thousand, nine hundred twenty".