266799556 has 9 divisors (see below), whose sum is σ = 466956399. Its totient is φ = 133383444.

The previous prime is 266799551. The next prime is 266799613. The reversal of 266799556 is 655997662.

The square root of 266799556 is 16334.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266799497 and 266799506.

It is not an unprimeable number, because it can be changed into a prime (266799551) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 28585 + ... + 36751.

Almost surely, 2^266799556 is an apocalyptic number.

266799556 is the 16334-th square number.

It is an amenable number.

266799556 is a deficient number, since it is larger than the sum of its proper divisors (200156843).

266799556 is an frugal number, since it uses more digits than its factorization.

266799556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16338 (or 8169 counting only the distinct ones).

The product of its digits is 6123600, while the sum is 55.

The cubic root of 266799556 is about 643.7664913487.

The spelling of 266799556 in words is "two hundred sixty-six million, seven hundred ninety-nine thousand, five hundred fifty-six".