266155660 has 24 divisors (see below), whose sum is σ = 559233360. Its totient is φ = 106403904.

The previous prime is 266155651. The next prime is 266155679. The reversal of 266155660 is 66551662.

266155660 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 70911 + ... + 74569.

It is an arithmetic number, because the mean of its divisors is an integer number (23301390).

Almost surely, 2^266155660 is an apocalyptic number.

266155660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266155660 is an abundant number, since it is smaller than the sum of its proper divisors (293077700).

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

266155660 is a wasteful number, since it uses less digits than its factorization.

266155660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7305 (or 7303 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 266155660 is about 16314.2777958450. The cubic root of 266155660 is about 643.2481839094.

It can be divided in two parts, 266155 and 660, that added together give a triangular number (266815 = T₇₃₀).

The spelling of 266155660 in words is "two hundred sixty-six million, one hundred fifty-five thousand, six hundred sixty".