266161560 has 64 divisors (see below), whose sum is σ = 912556800. Its totient is φ = 60836736.

The previous prime is 266161547. The next prime is 266161561. The reversal of 266161560 is 65161662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266161561) 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 15 ways as a sum of consecutive naturals, for example, 157590 + ... + 159269.

It is an arithmetic number, because the mean of its divisors is an integer number (14258700).

Almost surely, 2^266161560 is an apocalyptic number.

266161560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266161560 is an abundant number, since it is smaller than the sum of its proper divisors (646395240).

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

266161560 is a wasteful number, since it uses less digits than its factorization.

266161560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316880 (or 316876 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 266161560 is about 16314.4586180480. The cubic root of 266161560 is about 643.2529369378.

The spelling of 266161560 in words is "two hundred sixty-six million, one hundred sixty-one thousand, five hundred sixty".