266464505 has 4 divisors (see below), whose sum is σ = 319757412. Its totient is φ = 213171600.

The previous prime is 266464501. The next prime is 266464543. The reversal of 266464505 is 505464662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86341264 + 180123241 = 9292^2 + 13421^2 .

It is not a de Polignac number, because 266464505 - 2² = 266464501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266464501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26646446 + ... + 26646455.

It is an arithmetic number, because the mean of its divisors is an integer number (79939353).

Almost surely, 2^266464505 is an apocalyptic number.

It is an amenable number.

266464505 is a deficient number, since it is larger than the sum of its proper divisors (53292907).

266464505 is an equidigital number, since it uses as much as digits as its factorization.

266464505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53292906.

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 266464505 is about 16323.7405333459. The cubic root of 266464505 is about 643.4968944974.

The spelling of 266464505 in words is "two hundred sixty-six million, four hundred sixty-four thousand, five hundred five".