266033945 has 4 divisors (see below), whose sum is σ = 319240740. Its totient is φ = 212827152.

The previous prime is 266033923. The next prime is 266033951. The reversal of 266033945 is 549330662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549330662 = 2 ⋅274665331.

It can be written as a sum of positive squares in 2 ways, for example, as 171924544 + 94109401 = 13112^2 + 9701^2 .

It is a cyclic number.

It is not a de Polignac number, because 266033945 - 2¹⁸ = 265771801 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 266033899 and 266033908.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26603390 + ... + 26603399.

It is an arithmetic number, because the mean of its divisors is an integer number (79810185).

Almost surely, 2^266033945 is an apocalyptic number.

It is an amenable number.

266033945 is a deficient number, since it is larger than the sum of its proper divisors (53206795).

266033945 is an equidigital number, since it uses as much as digits as its factorization.

266033945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53206794.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 266033945 is about 16310.5470478461. The cubic root of 266033945 is about 643.1501148692.

The spelling of 266033945 in words is "two hundred sixty-six million, thirty-three thousand, nine hundred forty-five".