266165005 has 8 divisors (see below), whose sum is σ = 338186232. Its totient is φ = 200406528.

The previous prime is 266164999. The next prime is 266165017. The reversal of 266165005 is 500561662.

It can be written as a sum of positive squares in 4 ways, for example, as 55160329 + 211004676 = 7427^2 + 14526^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 266165005 - 2⁵ = 266164973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1565592 + ... + 1565761.

It is an arithmetic number, because the mean of its divisors is an integer number (42273279).

Almost surely, 2^266165005 is an apocalyptic number.

It is an amenable number.

266165005 is a deficient number, since it is larger than the sum of its proper divisors (72021227).

266165005 is a wasteful number, since it uses less digits than its factorization.

266165005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131375.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 266165005 is about 16314.5641988991. The cubic root of 266165005 is about 643.2557121906.

The spelling of 266165005 in words is "two hundred sixty-six million, one hundred sixty-five thousand, five".