266236990 has 32 divisors (see below), whose sum is σ = 495855360. Its totient is φ = 102816000.

The previous prime is 266236973. The next prime is 266237011. The reversal of 266236990 is 99632662.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 185596 + ... + 187024.

It is an arithmetic number, because the mean of its divisors is an integer number (15495480).

Almost surely, 2^266236990 is an apocalyptic number.

266236990 is a deficient number, since it is larger than the sum of its proper divisors (229618370).

266236990 is a wasteful number, since it uses less digits than its factorization.

266236990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 266236990 is about 16316.7702073664. The cubic root of 266236990 is about 643.3136970092.

The spelling of 266236990 in words is "two hundred sixty-six million, two hundred thirty-six thousand, nine hundred ninety".