166650049 has 2 divisors, whose sum is σ = 166650050. Its totient is φ = 166650048.

The previous prime is 166650047. The next prime is 166650061. The reversal of 166650049 is 940056661.

166650049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121330225 + 45319824 = 11015^2 + 6732^2 .

It is an emirp because it is prime and its reverse (940056661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166650049 - 2¹ = 166650047 is a prime.

Together with 166650047, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166650041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83325024 + 83325025.

It is an arithmetic number, because the mean of its divisors is an integer number (83325025).

Almost surely, 2^166650049 is an apocalyptic number.

It is an amenable number.

166650049 is a deficient number, since it is larger than the sum of its proper divisors (1).

166650049 is an equidigital number, since it uses as much as digits as its factorization.

166650049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 166650049 is about 12909.3008718520. The cubic root of 166650049 is about 550.3029174324.

It can be divided in two parts, 1666 and 50049, that added together give a palindrome (51715).

The spelling of 166650049 in words is "one hundred sixty-six million, six hundred fifty thousand, forty-nine".