166849547 has 2 divisors, whose sum is σ = 166849548. Its totient is φ = 166849546.

The previous prime is 166849523. The next prime is 166849549. The reversal of 166849547 is 745948661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166849547 - 2¹⁶ = 166784011 is a prime.

Together with 166849549, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 166849495 and 166849504.

It is not a weakly prime, because it can be changed into another prime (166849549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83424773 + 83424774.

It is an arithmetic number, because the mean of its divisors is an integer number (83424774).

Almost surely, 2^166849547 is an apocalyptic number.

166849547 is a deficient number, since it is larger than the sum of its proper divisors (1).

166849547 is an equidigital number, since it uses as much as digits as its factorization.

166849547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 50.

The square root of 166849547 is about 12917.0254702853. The cubic root of 166849547 is about 550.5224204235.

It can be divided in two parts, 1668 and 49547, that added together give a palindrome (51215).

The spelling of 166849547 in words is "one hundred sixty-six million, eight hundred forty-nine thousand, five hundred forty-seven".