166868503 has 8 divisors (see below), whose sum is σ = 169408800. Its totient is φ = 164343168.

The previous prime is 166868497. The next prime is 166868561. The reversal of 166868503 is 305868661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166868503 is a prime.

It is a super-2 number, since 2×166868503² = 55690194586922018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166868503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166868573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19843 + ... + 26971.

It is an arithmetic number, because the mean of its divisors is an integer number (21176100).

Almost surely, 2^166868503 is an apocalyptic number.

166868503 is a deficient number, since it is larger than the sum of its proper divisors (2540297).

166868503 is an equidigital number, since it uses as much as digits as its factorization.

166868503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7481.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 166868503 is about 12917.7592097082. The cubic root of 166868503 is about 550.5432681633.

The spelling of 166868503 in words is "one hundred sixty-six million, eight hundred sixty-eight thousand, five hundred three".