661183301 has 2 divisors, whose sum is σ = 661183302. Its totient is φ = 661183300.

The previous prime is 661183207. The next prime is 661183333. The reversal of 661183301 is 103381166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434680801 + 226502500 = 20849^2 + 15050^2 .

It is a cyclic number.

It is not a de Polignac number, because 661183301 - 2¹⁴ = 661166917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661183381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330591650 + 330591651.

It is an arithmetic number, because the mean of its divisors is an integer number (330591651).

Almost surely, 2^661183301 is an apocalyptic number.

It is an amenable number.

661183301 is a deficient number, since it is larger than the sum of its proper divisors (1).

661183301 is an equidigital number, since it uses as much as digits as its factorization.

661183301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 661183301 is about 25713.4848085591. The cubic root of 661183301 is about 871.1787874501.

The spelling of 661183301 in words is "six hundred sixty-one million, one hundred eighty-three thousand, three hundred one".