331666037 has 2 divisors, whose sum is σ = 331666038. Its totient is φ = 331666036.

The previous prime is 331666031. The next prime is 331666051. The reversal of 331666037 is 730666133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241149841 + 90516196 = 15529^2 + 9514^2 .

It is an emirp because it is prime and its reverse (730666133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331666037 - 2⁸ = 331665781 is a prime.

It is a super-2 number, since 2×331666037² = 220004720198570738, which contains 22 as substring.

It is equal to p_17870264 and since 331666037 and 17870264 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 331665988 and 331666006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331666031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165833018 + 165833019.

It is an arithmetic number, because the mean of its divisors is an integer number (165833019).

Almost surely, 2^331666037 is an apocalyptic number.

It is an amenable number.

331666037 is a deficient number, since it is larger than the sum of its proper divisors (1).

331666037 is an equidigital number, since it uses as much as digits as its factorization.

331666037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 35.

The square root of 331666037 is about 18211.7005521176. The cubic root of 331666037 is about 692.2033028071.

The spelling of 331666037 in words is "three hundred thirty-one million, six hundred sixty-six thousand, thirty-seven".