266561054 has 8 divisors (see below), whose sum is σ = 423361728. Its totient is φ = 125440480.

The previous prime is 266561047. The next prime is 266561059. The reversal of 266561054 is 450165662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×266561054³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266561059) 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 in 3 ways as a sum of consecutive naturals, for example, 3919982 + ... + 3920049.

It is an arithmetic number, because the mean of its divisors is an integer number (52920216).

Almost surely, 2^266561054 is an apocalyptic number.

266561054 is a deficient number, since it is larger than the sum of its proper divisors (156800674).

266561054 is a wasteful number, since it uses less digits than its factorization.

266561054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7840050.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 266561054 is about 16326.6975840186. The cubic root of 266561054 is about 643.5746052597.

The spelling of 266561054 in words is "two hundred sixty-six million, five hundred sixty-one thousand, fifty-four".