266912172 has 144 divisors (see below), whose sum is σ = 767763360. Its totient is φ = 80704512.

The previous prime is 266912161. The next prime is 266912197. The reversal of 266912172 is 271219662.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 478918 + ... + 479474.

It is an arithmetic number, because the mean of its divisors is an integer number (5331690).

Almost surely, 2^266912172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266912172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383881680).

266912172 is an abundant number, since it is smaller than the sum of its proper divisors (500851188).

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

266912172 is a wasteful number, since it uses less digits than its factorization.

266912172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 608 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 266912172 is about 16337.4469241678. The cubic root of 266912172 is about 643.8570564782.

It can be divided in two parts, 2669 and 12172, that added together give a palindrome (14841).

The spelling of 266912172 in words is "two hundred sixty-six million, nine hundred twelve thousand, one hundred seventy-two".