266925601 has 4 divisors (see below), whose sum is σ = 266963332. Its totient is φ = 266887872.

The previous prime is 266925577. The next prime is 266925629. The reversal of 266925601 is 106529662.

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 97535376 + 169390225 = 9876^2 + 13015^2 .

It is a 3-Lehmer number, since φ(266925601) divides (266925601-1)³.

It is a cyclic number.

It is not a de Polignac number, because 266925601 - 2²¹ = 264828449 is a prime.

It is a super-2 number, since 2×266925601² = 142498552938422402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266925301) 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, 4716 + ... + 23581.

It is an arithmetic number, because the mean of its divisors is an integer number (66740833).

It is a Poulet number, since it divides 2^266925600-1.

Almost surely, 2^266925601 is an apocalyptic number.

266925601 is the 9433-rd octagonal number.

It is an amenable number.

266925601 is a deficient number, since it is larger than the sum of its proper divisors (37731).

266925601 is an equidigital number, since it uses as much as digits as its factorization.

266925601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37730.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 266925601 is about 16337.8579073268. The cubic root of 266925601 is about 643.8678543015.

The spelling of 266925601 in words is "two hundred sixty-six million, nine hundred twenty-five thousand, six hundred one".