366631481 has 2 divisors, whose sum is σ = 366631482. Its totient is φ = 366631480.

The previous prime is 366631457. The next prime is 366631511. The reversal of 366631481 is 184136663.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 324576256 + 42055225 = 18016^2 + 6485^2 .

It is an emirp because it is prime and its reverse (184136663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 366631481 - 2⁶ = 366631417 is a prime.

It is a super-2 number, since 2×366631481² = 268837285720506722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (366631081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183315740 + 183315741.

It is an arithmetic number, because the mean of its divisors is an integer number (183315741).

Almost surely, 2^366631481 is an apocalyptic number.

It is an amenable number.

366631481 is a deficient number, since it is larger than the sum of its proper divisors (1).

366631481 is an equidigital number, since it uses as much as digits as its factorization.

366631481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 366631481 is about 19147.6233773281. The cubic root of 366631481 is about 715.7201611558.

The spelling of 366631481 in words is "three hundred sixty-six million, six hundred thirty-one thousand, four hundred eighty-one".