166159403 has 2 divisors, whose sum is σ = 166159404. Its totient is φ = 166159402.

The previous prime is 166159391. The next prime is 166159451. The reversal of 166159403 is 304951661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166159403 - 2⁴ = 166159387 is a prime.

It is not a weakly prime, because it can be changed into another prime (166159463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83079701 + 83079702.

It is an arithmetic number, because the mean of its divisors is an integer number (83079702).

Almost surely, 2^166159403 is an apocalyptic number.

166159403 is a deficient number, since it is larger than the sum of its proper divisors (1).

166159403 is an equidigital number, since it uses as much as digits as its factorization.

166159403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 166159403 is about 12890.2832785009. The cubic root of 166159403 is about 549.7623248549.

The spelling of 166159403 in words is "one hundred sixty-six million, one hundred fifty-nine thousand, four hundred three".