261066301 has 4 divisors (see below), whose sum is σ = 261890172. Its totient is φ = 260242432.

The previous prime is 261066271. The next prime is 261066313. The reversal of 261066301 is 103660162.

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 113443801 + 147622500 = 10651^2 + 12150^2 .

It is a cyclic number.

It is not a de Polignac number, because 261066301 - 2⁵ = 261066269 is a prime.

It is a super-2 number, since 2×261066301² = 136311227035645202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261066391) 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, 411460 + ... + 412093.

It is an arithmetic number, because the mean of its divisors is an integer number (65472543).

Almost surely, 2^261066301 is an apocalyptic number.

It is an amenable number.

261066301 is a deficient number, since it is larger than the sum of its proper divisors (823871).

261066301 is an equidigital number, since it uses as much as digits as its factorization.

261066301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823870.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 261066301 is about 16157.5462555426. The cubic root of 261066301 is about 639.1217616997.

The spelling of 261066301 in words is "two hundred sixty-one million, sixty-six thousand, three hundred one".