266250005 has 32 divisors (see below), whose sum is σ = 393963264. Its totient is φ = 168569856.

The previous prime is 266249993. The next prime is 266250043. The reversal of 266250005 is 500052662.

It is a happy number.

It is not a de Polignac number, because 266250005 - 2⁸ = 266249749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27314 + ... + 35756.

It is an arithmetic number, because the mean of its divisors is an integer number (12311352).

Almost surely, 2^266250005 is an apocalyptic number.

It is an amenable number.

266250005 is a deficient number, since it is larger than the sum of its proper divisors (127713259).

266250005 is a wasteful number, since it uses less digits than its factorization.

266250005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8525.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 266250005 is about 16317.1690252936. The cubic root of 266250005 is about 643.3241796389.

The spelling of 266250005 in words is "two hundred sixty-six million, two hundred fifty thousand, five".