266766001 has 4 divisors (see below), whose sum is σ = 266810992. Its totient is φ = 266721012.

The previous prime is 266765999. The next prime is 266766007. The reversal of 266766001 is 100667662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266766001 - 2¹ = 266765999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266766007) 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, 11955 + ... + 26008.

It is an arithmetic number, because the mean of its divisors is an integer number (66702748).

Almost surely, 2^266766001 is an apocalyptic number.

It is an amenable number.

266766001 is a deficient number, since it is larger than the sum of its proper divisors (44991).

266766001 is an equidigital number, since it uses as much as digits as its factorization.

266766001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44990.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 266766001 is about 16332.9728157491. The cubic root of 266766001 is about 643.7395016857.

The spelling of 266766001 in words is "two hundred sixty-six million, seven hundred sixty-six thousand, one".