266195780 has 48 divisors (see below), whose sum is σ = 584914176. Its totient is φ = 101656320.

The previous prime is 266195779. The next prime is 266195803. The reversal of 266195780 is 87591662.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35087 + ... + 41993.

It is an arithmetic number, because the mean of its divisors is an integer number (12185712).

Almost surely, 2^266195780 is an apocalyptic number.

266195780 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 266195780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292457088).

266195780 is an abundant number, since it is smaller than the sum of its proper divisors (318718396).

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

266195780 is a wasteful number, since it uses less digits than its factorization.

266195780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7004 (or 7002 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 266195780 is about 16315.5073473061. The cubic root of 266195780 is about 643.2805031176.

The spelling of 266195780 in words is "two hundred sixty-six million, one hundred ninety-five thousand, seven hundred eighty".