266000505 has 16 divisors (see below), whose sum is σ = 430990080. Its totient is φ = 140070528.

The previous prime is 266000461. The next prime is 266000509. The reversal of 266000505 is 505000662.

It is not a de Polignac number, because 266000505 - 2⁸ = 266000249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (266000509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111052 + ... + 113421.

It is an arithmetic number, because the mean of its divisors is an integer number (26936880).

Almost surely, 2^266000505 is an apocalyptic number.

It is an amenable number.

266000505 is a deficient number, since it is larger than the sum of its proper divisors (164989575).

266000505 is a wasteful number, since it uses less digits than its factorization.

266000505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224560.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 266000505 is about 16309.5219120611. The cubic root of 266000505 is about 643.1231661264.

The spelling of 266000505 in words is "two hundred sixty-six million, five hundred five", and thus it is an aban number.