266404165 has 8 divisors (see below), whose sum is σ = 322850808. Its totient is φ = 211012800.

The previous prime is 266404163. The next prime is 266404211. The reversal of 266404165 is 561404662.

It can be written as a sum of positive squares in 4 ways, for example, as 73805281 + 192598884 = 8591^2 + 13878^2 .

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

It is not a de Polignac number, because 266404165 - 2¹ = 266404163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266404165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266404163) 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, 263262 + ... + 264271.

It is an arithmetic number, because the mean of its divisors is an integer number (40356351).

Almost surely, 2^266404165 is an apocalyptic number.

It is an amenable number.

266404165 is a deficient number, since it is larger than the sum of its proper divisors (56446643).

266404165 is a wasteful number, since it uses less digits than its factorization.

266404165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527639.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 266404165 is about 16321.8922003547. The cubic root of 266404165 is about 643.4483182542.

The spelling of 266404165 in words is "two hundred sixty-six million, four hundred four thousand, one hundred sixty-five".