166605060999 has 16 divisors (see below), whose sum is σ = 251818716800. Its totient is φ = 97130075616.

The previous prime is 166605060989. The next prime is 166605061003. The reversal of 166605060999 is 999060506661.

It is not a de Polignac number, because 166605060999 - 2⁴ = 166605060983 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166605060949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112418329 + ... + 112419810.

It is an arithmetic number, because the mean of its divisors is an integer number (15738669800).

Almost surely, 2^166605060999 is an apocalyptic number.

166605060999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

166605060999 is a deficient number, since it is larger than the sum of its proper divisors (85213655801).

166605060999 is a wasteful number, since it uses less digits than its factorization.

166605060999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224838174.

The product of its (nonzero) digits is 4723920, while the sum is 57.

The spelling of 166605060999 in words is "one hundred sixty-six billion, six hundred five million, sixty thousand, nine hundred ninety-nine".