166340997 has 6 divisors (see below), whose sum is σ = 240270342. Its totient is φ = 110893992.

The previous prime is 166340989. The next prime is 166341017. The reversal of 166340997 is 799043661.

166340997 is a `hidden beast` number, since 1 + 6 + 634 + 0 + 9 + 9 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 152547201 + 13793796 = 12351^2 + 3714^2 .

It is not a de Polignac number, because 166340997 - 2³ = 166340989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166340927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9241158 + ... + 9241175.

It is an arithmetic number, because the mean of its divisors is an integer number (40045057).

Almost surely, 2^166340997 is an apocalyptic number.

It is an amenable number.

166340997 is a deficient number, since it is larger than the sum of its proper divisors (73929345).

166340997 is a wasteful number, since it uses less digits than its factorization.

166340997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18482339 (or 18482336 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 166340997 is about 12897.3251878054. The cubic root of 166340997 is about 549.9625285766.

The spelling of 166340997 in words is "one hundred sixty-six million, three hundred forty thousand, nine hundred ninety-seven".