266609568 has 96 divisors (see below), whose sum is σ = 734517504. Its totient is φ = 84575232.

The previous prime is 266609533. The next prime is 266609573. The reversal of 266609568 is 865906662.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166146 + ... + 167742.

It is an arithmetic number, because the mean of its divisors is an integer number (7651224).

Almost surely, 2^266609568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266609568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367258752).

266609568 is an abundant number, since it is smaller than the sum of its proper divisors (467907936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266609568 is a wasteful number, since it uses less digits than its factorization.

266609568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694 (or 1686 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 266609568 is about 16328.1832424799. The cubic root of 266609568 is about 643.6136463273.

The spelling of 266609568 in words is "two hundred sixty-six million, six hundred nine thousand, five hundred sixty-eight".