165621104683 has 2 divisors, whose sum is σ = 165621104684. Its totient is φ = 165621104682.

The previous prime is 165621104651. The next prime is 165621104689. The reversal of 165621104683 is 386401126561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165621104683 - 2⁵ = 165621104651 is a prime.

It is not a weakly prime, because it can be changed into another prime (165621104689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82810552341 + 82810552342.

It is an arithmetic number, because the mean of its divisors is an integer number (82810552342).

Almost surely, 2^165621104683 is an apocalyptic number.

165621104683 is a deficient number, since it is larger than the sum of its proper divisors (1).

165621104683 is an equidigital number, since it uses as much as digits as its factorization.

165621104683 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 165621104683 in words is "one hundred sixty-five billion, six hundred twenty-one million, one hundred four thousand, six hundred eighty-three".