266461505 has 4 divisors (see below), whose sum is σ = 319753812. Its totient is φ = 213169200.

The previous prime is 266461487. The next prime is 266461511. The reversal of 266461505 is 505164662.

266461505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 209323024 + 57138481 = 14468^2 + 7559^2 .

It is not a de Polignac number, because 266461505 - 2⁶ = 266461441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26646146 + ... + 26646155.

It is an arithmetic number, because the mean of its divisors is an integer number (79938453).

Almost surely, 2^266461505 is an apocalyptic number.

It is an amenable number.

266461505 is a deficient number, since it is larger than the sum of its proper divisors (53292307).

266461505 is an equidigital number, since it uses as much as digits as its factorization.

266461505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53292306.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 266461505 is about 16323.6486423838. The cubic root of 266461505 is about 643.4944795442.

The spelling of 266461505 in words is "two hundred sixty-six million, four hundred sixty-one thousand, five hundred five".