266055690 has 16 divisors (see below), whose sum is σ = 638533728. Its totient is φ = 70948176.

The previous prime is 266055679. The next prime is 266055703. The reversal of 266055690 is 96550662.

It is a super-2 number, since 2×266055690² = 141571260362752200, which contains 22 as substring.

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, 4434232 + ... + 4434291.

It is an arithmetic number, because the mean of its divisors is an integer number (39908358).

Almost surely, 2^266055690 is an apocalyptic number.

266055690 is an abundant number, since it is smaller than the sum of its proper divisors (372478038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266055690 is a wasteful number, since it uses less digits than its factorization.

266055690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8868533.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 266055690 is about 16311.2136274405. The cubic root of 266055690 is about 643.1676375932.

The spelling of 266055690 in words is "two hundred sixty-six million, fifty-five thousand, six hundred ninety".