166603253 has 2 divisors, whose sum is σ = 166603254. Its totient is φ = 166603252.

The previous prime is 166603211. The next prime is 166603277. The reversal of 166603253 is 352306661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149768644 + 16834609 = 12238^2 + 4103^2 .

It is a cyclic number.

It is not a de Polignac number, because 166603253 - 2⁶ = 166603189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166603453) 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, 83301626 + 83301627.

It is an arithmetic number, because the mean of its divisors is an integer number (83301627).

Almost surely, 2^166603253 is an apocalyptic number.

It is an amenable number.

166603253 is a deficient number, since it is larger than the sum of its proper divisors (1).

166603253 is an equidigital number, since it uses as much as digits as its factorization.

166603253 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 32.

The square root of 166603253 is about 12907.4882529484. The cubic root of 166603253 is about 550.2514035239.

The spelling of 166603253 in words is "one hundred sixty-six million, six hundred three thousand, two hundred fifty-three".