266622673 has 4 divisors (see below), whose sum is σ = 266734080. Its totient is φ = 266511268.

The previous prime is 266622667. The next prime is 266622683. The reversal of 266622673 is 376226662.

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 266622673 - 2⁵ = 266622641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266622683) 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, 52033 + ... + 56926.

It is an arithmetic number, because the mean of its divisors is an integer number (66683520).

Almost surely, 2^266622673 is an apocalyptic number.

It is an amenable number.

266622673 is a deficient number, since it is larger than the sum of its proper divisors (111407).

266622673 is a wasteful number, since it uses less digits than its factorization.

266622673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111406.

The product of its digits is 217728, while the sum is 40.

The square root of 266622673 is about 16328.5845375525. The cubic root of 266622673 is about 643.6241916086.

The spelling of 266622673 in words is "two hundred sixty-six million, six hundred twenty-two thousand, six hundred seventy-three".