601260661 has 2 divisors, whose sum is σ = 601260662. Its totient is φ = 601260660.

The previous prime is 601260659. The next prime is 601260679. The reversal of 601260661 is 166062106.

601260661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is the 10011-st star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 460102500 + 141158161 = 21450^2 + 11881^2 .

It is a cyclic number.

It is not a de Polignac number, because 601260661 - 2¹ = 601260659 is a prime.

Together with 601260659, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (601260691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300630330 + 300630331.

It is an arithmetic number, because the mean of its divisors is an integer number (300630331).

Almost surely, 2^601260661 is an apocalyptic number.

It is an amenable number.

601260661 is a deficient number, since it is larger than the sum of its proper divisors (1).

601260661 is an equidigital number, since it uses as much as digits as its factorization.

601260661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 601260661 is about 24520.6170599355. The cubic root of 601260661 is about 844.0229646612.

The spelling of 601260661 in words is "six hundred one million, two hundred sixty thousand, six hundred sixty-one".