266590990 has 16 divisors (see below), whose sum is σ = 487027152. Its totient is φ = 105044544.

The previous prime is 266590943. The next prime is 266591009. The reversal of 266590990 is 99095662.

It is a self number, because there is not a number n which added to its sum of digits gives 266590990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198279 + ... + 199618.

It is an arithmetic number, because the mean of its divisors is an integer number (30439197).

Almost surely, 2^266590990 is an apocalyptic number.

266590990 is a deficient number, since it is larger than the sum of its proper divisors (220436162).

266590990 is a wasteful number, since it uses less digits than its factorization.

266590990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397971.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 266590990 is about 16327.6143389045. The cubic root of 266590990 is about 643.5986964612.

The spelling of 266590990 in words is "two hundred sixty-six million, five hundred ninety thousand, nine hundred ninety".