266428065 has 8 divisors (see below), whose sum is σ = 426284928. Its totient is φ = 142094960.

The previous prime is 266428061. The next prime is 266428081. The reversal of 266428065 is 560824662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 266428065 - 2² = 266428061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (266428061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8880921 + ... + 8880950.

It is an arithmetic number, because the mean of its divisors is an integer number (53285616).

Almost surely, 2^266428065 is an apocalyptic number.

It is an amenable number.

266428065 is a deficient number, since it is larger than the sum of its proper divisors (159856863).

266428065 is a wasteful number, since it uses less digits than its factorization.

266428065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17761879.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 266428065 is about 16322.6243294392. The cubic root of 266428065 is about 643.4675596387.

The spelling of 266428065 in words is "two hundred sixty-six million, four hundred twenty-eight thousand, sixty-five".