266089601 has 4 divisors (see below), whose sum is σ = 268530900. Its totient is φ = 263648304.

The previous prime is 266089597. The next prime is 266089639. The reversal of 266089601 is 106980662.

266089601 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 132802576 + 133287025 = 11524^2 + 11545^2 .

It is a cyclic number.

It is not a de Polignac number, because 266089601 - 2² = 266089597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266089501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220486 + ... + 1220703.

It is an arithmetic number, because the mean of its divisors is an integer number (67132725).

Almost surely, 2^266089601 is an apocalyptic number.

It is an amenable number.

266089601 is a deficient number, since it is larger than the sum of its proper divisors (2441299).

266089601 is a wasteful number, since it uses less digits than its factorization.

266089601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441298.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 266089601 is about 16312.2530939169. The cubic root of 266089601 is about 643.1949621121.

The spelling of 266089601 in words is "two hundred sixty-six million, eighty-nine thousand, six hundred one".