166324068553 has 4 divisors (see below), whose sum is σ = 166325736960. Its totient is φ = 166322400148.

The previous prime is 166324068539. The next prime is 166324068571. The reversal of 166324068553 is 355860423661.

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, and also an emirpimes, since its reverse is a distinct semiprime: 355860423661 = 109 ⋅3264774529.

It is a cyclic number.

It is not a de Polignac number, because 166324068553 - 2⁹ = 166324068041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166324068497 and 166324068506.

It is not an unprimeable number, because it can be changed into a prime (166324068653) 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, 674473 + ... + 887446.

It is an arithmetic number, because the mean of its divisors is an integer number (41581434240).

Almost surely, 2^166324068553 is an apocalyptic number.

It is an amenable number.

166324068553 is a deficient number, since it is larger than the sum of its proper divisors (1668407).

166324068553 is a wasteful number, since it uses less digits than its factorization.

166324068553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668406.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 166324068553 in words is "one hundred sixty-six billion, three hundred twenty-four million, sixty-eight thousand, five hundred fifty-three".