266665060 has 24 divisors (see below), whose sum is σ = 592938360. Its totient is φ = 100391424.

The previous prime is 266665051. The next prime is 266665081. The reversal of 266665060 is 60566662.

It can be written as a sum of positive squares in 4 ways, for example, as 59074596 + 207590464 = 7686^2 + 14408^2 .

It is a super-2 number, since 2×266665060² = 142220508449607200, which contains 22 as substring.

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, 391815 + ... + 392494.

It is an arithmetic number, because the mean of its divisors is an integer number (24705765).

Almost surely, 2^266665060 is an apocalyptic number.

266665060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266665060 is an abundant number, since it is smaller than the sum of its proper divisors (326273300).

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

266665060 is a wasteful number, since it uses less digits than its factorization.

266665060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784335 (or 784333 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 266665060 is about 16329.8824245614. The cubic root of 266665060 is about 643.6582970515.

The spelling of 266665060 in words is "two hundred sixty-six million, six hundred sixty-five thousand, sixty".