166828704423 has 4 divisors (see below), whose sum is σ = 222438272568. Its totient is φ = 111219136280.

The previous prime is 166828704401. The next prime is 166828704461. The reversal of 166828704423 is 324407828661.

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

It is a cyclic number.

It is not a de Polignac number, because 166828704423 - 2⁵ = 166828704391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166828704323) 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, 27804784068 + ... + 27804784073.

It is an arithmetic number, because the mean of its divisors is an integer number (55609568142).

Almost surely, 2^166828704423 is an apocalyptic number.

166828704423 is a deficient number, since it is larger than the sum of its proper divisors (55609568145).

166828704423 is an equidigital number, since it uses as much as digits as its factorization.

166828704423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55609568144.

The product of its (nonzero) digits is 3096576, while the sum is 51.

The spelling of 166828704423 in words is "one hundred sixty-six billion, eight hundred twenty-eight million, seven hundred four thousand, four hundred twenty-three".