366445661 has 2 divisors, whose sum is σ = 366445662. Its totient is φ = 366445660.

The previous prime is 366445643. The next prime is 366445721. The reversal of 366445661 is 166544663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331458436 + 34987225 = 18206^2 + 5915^2 .

It is an emirp because it is prime and its reverse (166544663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 366445661 - 2¹⁴ = 366429277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (366445601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183222830 + 183222831.

It is an arithmetic number, because the mean of its divisors is an integer number (183222831).

Almost surely, 2^366445661 is an apocalyptic number.

It is an amenable number.

366445661 is a deficient number, since it is larger than the sum of its proper divisors (1).

366445661 is an equidigital number, since it uses as much as digits as its factorization.

366445661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 41.

The square root of 366445661 is about 19142.7704630234. The cubic root of 366445661 is about 715.5992244640.

The spelling of 366445661 in words is "three hundred sixty-six million, four hundred forty-five thousand, six hundred sixty-one".