366740021 has 2 divisors, whose sum is σ = 366740022. Its totient is φ = 366740020.

The previous prime is 366739993. The next prime is 366740053. The reversal of 366740021 is 120047663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340587025 + 26152996 = 18455^2 + 5114^2 .

It is a cyclic number.

It is not a de Polignac number, because 366740021 - 2¹⁰ = 366738997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (366740081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183370010 + 183370011.

It is an arithmetic number, because the mean of its divisors is an integer number (183370011).

Almost surely, 2^366740021 is an apocalyptic number.

It is an amenable number.

366740021 is a deficient number, since it is larger than the sum of its proper divisors (1).

366740021 is an equidigital number, since it uses as much as digits as its factorization.

366740021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 366740021 is about 19150.4574618989. The cubic root of 366740021 is about 715.7907830250.

Adding to 366740021 its reverse (120047663), we get a palindrome (486787684).

The spelling of 366740021 in words is "three hundred sixty-six million, seven hundred forty thousand, twenty-one".