266788772 has 6 divisors (see below), whose sum is σ = 466880358. Its totient is φ = 133394384.

The previous prime is 266788757. The next prime is 266788789. The reversal of 266788772 is 277887662.

It can be written as a sum of positive squares in only one way, i.e., 260951716 + 5837056 = 16154^2 + 2416^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 33348593 + ... + 33348600.

It is an arithmetic number, because the mean of its divisors is an integer number (77813393).

Almost surely, 2^266788772 is an apocalyptic number.

It is an amenable number.

266788772 is a deficient number, since it is larger than the sum of its proper divisors (200091586).

266788772 is a wasteful number, since it uses less digits than its factorization.

266788772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66697197 (or 66697195 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 53.

The square root of 266788772 is about 16333.6698876890. The cubic root of 266788772 is about 643.7578175819.

The spelling of 266788772 in words is "two hundred sixty-six million, seven hundred eighty-eight thousand, seven hundred seventy-two".