166359949 has 6 divisors (see below), whose sum is σ = 193520814. Its totient is φ = 142594200.

The previous prime is 166359917. The next prime is 166359959. The reversal of 166359949 is 949953661.

It can be written as a sum of positive squares in only one way, i.e., 145974724 + 20385225 = 12082^2 + 4515^2 .

It is not a de Polignac number, because 166359949 - 2⁵ = 166359917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166359896 and 166359905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166359959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1697502 + ... + 1697599.

It is an arithmetic number, because the mean of its divisors is an integer number (32253469).

Almost surely, 2^166359949 is an apocalyptic number.

It is an amenable number.

166359949 is a deficient number, since it is larger than the sum of its proper divisors (27160865).

166359949 is an equidigital number, since it uses as much as digits as its factorization.

166359949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3395115 (or 3395108 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 52.

The square root of 166359949 is about 12898.0598928676. The cubic root of 166359949 is about 549.9834143759.

The spelling of 166359949 in words is "one hundred sixty-six million, three hundred fifty-nine thousand, nine hundred forty-nine".