266045505 has 64 divisors (see below), whose sum is σ = 493793280. Its totient is φ = 120960000.

The previous prime is 266045501. The next prime is 266045509. The reversal of 266045505 is 505540662.

It is a happy number.

266045505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (266045501) and next prime (266045509).

It is not a de Polignac number, because 266045505 - 2² = 266045501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (266045501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 353880 + ... + 354630.

It is an arithmetic number, because the mean of its divisors is an integer number (7715520).

Almost surely, 2^266045505 is an apocalyptic number.

It is an amenable number.

266045505 is a deficient number, since it is larger than the sum of its proper divisors (227747775).

266045505 is a wasteful number, since it uses less digits than its factorization.

266045505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 266045505 is about 16310.9014159243. The cubic root of 266045505 is about 643.1594303566.

The spelling of 266045505 in words is "two hundred sixty-six million, forty-five thousand, five hundred five".