266081845 has 8 divisors (see below), whose sum is σ = 319822776. Its totient is φ = 212515776.

The previous prime is 266081843. The next prime is 266081863. The reversal of 266081845 is 548180662.

It can be written as a sum of positive squares in 4 ways, for example, as 1238769 + 264843076 = 1113^2 + 16274^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 266081845 - 2¹ = 266081843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266081798 and 266081807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266081843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40342 + ... + 46471.

It is an arithmetic number, because the mean of its divisors is an integer number (39977847).

Almost surely, 2^266081845 is an apocalyptic number.

It is an amenable number.

266081845 is a deficient number, since it is larger than the sum of its proper divisors (53740931).

266081845 is an equidigital number, since it uses as much as digits as its factorization.

266081845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87431.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 266081845 is about 16312.0153567853. The cubic root of 266081845 is about 643.1887127528.

The spelling of 266081845 in words is "two hundred sixty-six million, eighty-one thousand, eight hundred forty-five".