266691048 has 64 divisors (see below), whose sum is σ = 720316800. Its totient is φ = 81795840.

The previous prime is 266691041. The next prime is 266691083. The reversal of 266691048 is 840196662.

It is a super-2 number, since 2×266691048² = 142248230166676608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266691041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110818 + ... + 113198.

It is an arithmetic number, because the mean of its divisors is an integer number (11254950).

Almost surely, 2^266691048 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 266691048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360158400).

266691048 is an abundant number, since it is smaller than the sum of its proper divisors (453625752).

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

266691048 is a wasteful number, since it uses less digits than its factorization.

266691048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762 (or 2758 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 266691048 is about 16330.6781243156. The cubic root of 266691048 is about 643.6792057380.

The spelling of 266691048 in words is "two hundred sixty-six million, six hundred ninety-one thousand, forty-eight".