166055623203 has 4 divisors (see below), whose sum is σ = 221407497608. Its totient is φ = 110703748800.

The previous prime is 166055623121. The next prime is 166055623211. The reversal of 166055623203 is 302326550661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 166055623203 - 2²² = 166051428899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166055623003) 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, 27675937198 + ... + 27675937203.

It is an arithmetic number, because the mean of its divisors is an integer number (55351874402).

Almost surely, 2^166055623203 is an apocalyptic number.

166055623203 is a deficient number, since it is larger than the sum of its proper divisors (55351874405).

166055623203 is an equidigital number, since it uses as much as digits as its factorization.

166055623203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55351874404.

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 166055623203 in words is "one hundred sixty-six billion, fifty-five million, six hundred twenty-three thousand, two hundred three".