266400041 has 4 divisors (see below), whose sum is σ = 267362052. Its totient is φ = 265438032.

The previous prime is 266400031. The next prime is 266400049. The reversal of 266400041 is 140004662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91393600 + 175006441 = 9560^2 + 13229^2 .

It is a cyclic number.

It is not a de Polignac number, because 266400041 - 2¹⁴ = 266383657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266400049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480590 + ... + 481143.

It is an arithmetic number, because the mean of its divisors is an integer number (66840513).

Almost surely, 2^266400041 is an apocalyptic number.

It is an amenable number.

266400041 is a deficient number, since it is larger than the sum of its proper divisors (962011).

266400041 is an equidigital number, since it uses as much as digits as its factorization.

266400041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962010.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 266400041 is about 16321.7658664741. The cubic root of 266400041 is about 643.4449979926. Note that the first 3 decimals are identical.

The spelling of 266400041 in words is "two hundred sixty-six million, four hundred thousand, forty-one".