166548949 has 16 divisors (see below), whose sum is σ = 205348608. Its totient is φ = 131818752.

The previous prime is 166548937. The next prime is 166548953. The reversal of 166548949 is 949845661.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 166548949 - 2⁷ = 166548821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166548896 and 166548905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166548959) 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 in 15 ways as a sum of consecutive naturals, for example, 6897 + ... + 19510.

It is an arithmetic number, because the mean of its divisors is an integer number (12834288).

Almost surely, 2^166548949 is an apocalyptic number.

It is an amenable number.

166548949 is a deficient number, since it is larger than the sum of its proper divisors (38799659).

166548949 is a wasteful number, since it uses less digits than its factorization.

166548949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26484.

The product of its digits is 1866240, while the sum is 52.

The square root of 166548949 is about 12905.3844964030. The cubic root of 166548949 is about 550.1916125759.

The spelling of 166548949 in words is "one hundred sixty-six million, five hundred forty-eight thousand, nine hundred forty-nine".