166663153 has 2 divisors, whose sum is σ = 166663154. Its totient is φ = 166663152.

The previous prime is 166663139. The next prime is 166663177. The reversal of 166663153 is 351366661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94633984 + 72029169 = 9728^2 + 8487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166663153 is a prime.

It is equal to p_9326827 and since 166663153 and 9326827 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (166666153) 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 as a sum of consecutive naturals, namely, 83331576 + 83331577.

It is an arithmetic number, because the mean of its divisors is an integer number (83331577).

Almost surely, 2^166663153 is an apocalyptic number.

It is an amenable number.

166663153 is a deficient number, since it is larger than the sum of its proper divisors (1).

166663153 is an equidigital number, since it uses as much as digits as its factorization.

166663153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 37.

The square root of 166663153 is about 12909.8084029160. The cubic root of 166663153 is about 550.3173408314.

The spelling of 166663153 in words is "one hundred sixty-six million, six hundred sixty-three thousand, one hundred fifty-three".