166685003 has 8 divisors (see below), whose sum is σ = 168699648. Its totient is φ = 164678184.

The previous prime is 166684961. The next prime is 166685009. The reversal of 166685003 is 300586661.

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

It is a cyclic number.

It is not a de Polignac number, because 166685003 - 2⁸ = 166684747 is a prime.

It is a super-2 number, since 2×166685003² = 55567780450220018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166685009) 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 in 7 ways as a sum of consecutive naturals, for example, 48500 + ... + 51822.

It is an arithmetic number, because the mean of its divisors is an integer number (21087456).

Almost surely, 2^166685003 is an apocalyptic number.

166685003 is a deficient number, since it is larger than the sum of its proper divisors (2014645).

166685003 is a wasteful number, since it uses less digits than its factorization.

166685003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3913.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 166685003 is about 12910.6546309628. The cubic root of 166685003 is about 550.3413891553.

The spelling of 166685003 in words is "one hundred sixty-six million, six hundred eighty-five thousand, three".