266622644 has 6 divisors (see below), whose sum is σ = 466589634. Its totient is φ = 133311320.

The previous prime is 266622641. The next prime is 266622659. The reversal of 266622644 is 446226662.

It is a happy number.

266622644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 154008100 + 112614544 = 12410^2 + 10612^2 .

It is a junction number, because it is equal to n+sod(n) for n = 266622598 and 266622607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266622641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33327827 + ... + 33327834.

It is an arithmetic number, because the mean of its divisors is an integer number (77764939).

Almost surely, 2^266622644 is an apocalyptic number.

It is an amenable number.

266622644 is a deficient number, since it is larger than the sum of its proper divisors (199966990).

266622644 is a wasteful number, since it uses less digits than its factorization.

266622644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66655665 (or 66655663 counting only the distinct ones).

The product of its digits is 165888, while the sum is 38.

The square root of 266622644 is about 16328.5836495392. The cubic root of 266622644 is about 643.6241682734.

The spelling of 266622644 in words is "two hundred sixty-six million, six hundred twenty-two thousand, six hundred forty-four".