166843348661 has 4 divisors (see below), whose sum is σ = 182010925824. Its totient is φ = 151675771500.

The previous prime is 166843348627. The next prime is 166843348669.

166843348661 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 166843348661 - 2²² = 166839154357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166843348597 and 166843348606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166843348669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7583788565 + ... + 7583788586.

It is an arithmetic number, because the mean of its divisors is an integer number (45502731456).

Almost surely, 2^166843348661 is an apocalyptic number.

166843348661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166843348661 is a deficient number, since it is larger than the sum of its proper divisors (15167577163).

166843348661 is a wasteful number, since it uses less digits than its factorization.

166843348661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15167577162.

The product of its digits is 11943936, while the sum is 56.

The spelling of 166843348661 in words is "one hundred sixty-six billion, eight hundred forty-three million, three hundred forty-eight thousand, six hundred sixty-one".