266598001 has 4 divisors (see below), whose sum is σ = 269346532. Its totient is φ = 263849472.

The previous prime is 266597983. The next prime is 266598023. The reversal of 266598001 is 100895662.

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 67223601 + 199374400 = 8199^2 + 14120^2 .

It is a cyclic number.

It is not a de Polignac number, because 266598001 - 2¹⁷ = 266466929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266598071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1374120 + ... + 1374313.

It is an arithmetic number, because the mean of its divisors is an integer number (67336633).

Almost surely, 2^266598001 is an apocalyptic number.

It is an amenable number.

266598001 is a deficient number, since it is larger than the sum of its proper divisors (2748531).

266598001 is an equidigital number, since it uses as much as digits as its factorization.

266598001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748530.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 266598001 is about 16327.8290351167. The cubic root of 266598001 is about 643.6043383509.

The spelling of 266598001 in words is "two hundred sixty-six million, five hundred ninety-eight thousand, one".