266494556 has 6 divisors (see below), whose sum is σ = 466365480. Its totient is φ = 133247276.

The previous prime is 266494549. The next prime is 266494561. The reversal of 266494556 is 655494662.

It is a self number, because there is not a number n which added to its sum of digits gives 266494556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33311816 + ... + 33311823.

It is an arithmetic number, because the mean of its divisors is an integer number (77727580).

Almost surely, 2^266494556 is an apocalyptic number.

It is an amenable number.

266494556 is a deficient number, since it is larger than the sum of its proper divisors (199870924).

266494556 is a wasteful number, since it uses less digits than its factorization.

266494556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66623643 (or 66623641 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 47.

The square root of 266494556 is about 16324.6609765716. The cubic root of 266494556 is about 643.5210840836.

The spelling of 266494556 in words is "two hundred sixty-six million, four hundred ninety-four thousand, five hundred fifty-six".