164777673 has 4 divisors (see below), whose sum is σ = 219703568. Its totient is φ = 109851780.

The previous prime is 164777621. The next prime is 164777699. The reversal of 164777673 is 376777461.

164777673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 376777461 = 3 ⋅125592487.

It is not a de Polignac number, because 164777673 - 2¹² = 164773577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164777573) 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, 27462943 + ... + 27462948.

It is an arithmetic number, because the mean of its divisors is an integer number (54925892).

Almost surely, 2^164777673 is an apocalyptic number.

It is an amenable number.

164777673 is a deficient number, since it is larger than the sum of its proper divisors (54925895).

164777673 is an equidigital number, since it uses as much as digits as its factorization.

164777673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54925894.

The product of its digits is 1037232, while the sum is 48.

The square root of 164777673 is about 12836.5755947605. The cubic root of 164777673 is about 548.2341969213.

The spelling of 164777673 in words is "one hundred sixty-four million, seven hundred seventy-seven thousand, six hundred seventy-three".