331666051 has 2 divisors, whose sum is σ = 331666052. Its totient is φ = 331666050.

The previous prime is 331666037. The next prime is 331666067. The reversal of 331666051 is 150666133.

It is a weak prime.

It is an emirp because it is prime and its reverse (150666133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331666051 - 2¹⁵ = 331633283 is a prime.

It is a super-2 number, since 2×331666051² = 220004738771869202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331666031) 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, 165833025 + 165833026.

It is an arithmetic number, because the mean of its divisors is an integer number (165833026).

Almost surely, 2^331666051 is an apocalyptic number.

331666051 is a deficient number, since it is larger than the sum of its proper divisors (1).

331666051 is an equidigital number, since it uses as much as digits as its factorization.

331666051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 331666051 is about 18211.7009364859. The cubic root of 331666051 is about 692.2033125467.

The spelling of 331666051 in words is "three hundred thirty-one million, six hundred sixty-six thousand, fifty-one".