266563016 has 8 divisors (see below), whose sum is σ = 499805670. Its totient is φ = 133281504.

The previous prime is 266562997. The next prime is 266563019. The reversal of 266563016 is 610365662.

It can be written as a sum of positive squares in only one way, i.e., 238578916 + 27984100 = 15446^2 + 5290^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (266563019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16660181 + ... + 16660196.

Almost surely, 2^266563016 is an apocalyptic number.

It is an amenable number.

266563016 is a deficient number, since it is larger than the sum of its proper divisors (233242654).

266563016 is a wasteful number, since it uses less digits than its factorization.

266563016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33320383 (or 33320379 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 266563016 is about 16326.7576695436. The cubic root of 266563016 is about 643.5761842479.

The spelling of 266563016 in words is "two hundred sixty-six million, five hundred sixty-three thousand, sixteen".