266705145 has 72 divisors (see below), whose sum is σ = 540042048. Its totient is φ = 119260800.

The previous prime is 266705137. The next prime is 266705149. The reversal of 266705145 is 541507662.

It is a happy number.

It is not a de Polignac number, because 266705145 - 2³ = 266705137 is a prime.

It is a super-2 number, since 2×266705145² = 142263268738942050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266705149) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2640595 + ... + 2640695.

It is an arithmetic number, because the mean of its divisors is an integer number (7500584).

Almost surely, 2^266705145 is an apocalyptic number.

It is an amenable number.

266705145 is an abundant number, since it is smaller than the sum of its proper divisors (273336903).

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

266705145 is a wasteful number, since it uses less digits than its factorization.

266705145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 266705145 is about 16331.1097295928. The cubic root of 266705145 is about 643.6905469335.

The spelling of 266705145 in words is "two hundred sixty-six million, seven hundred five thousand, one hundred forty-five".