166791847 has 4 divisors (see below), whose sum is σ = 172543320. Its totient is φ = 161040376.

The previous prime is 166791829. The next prime is 166791853. The reversal of 166791847 is 748197661.

166791847 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 an emirpimes, since its reverse is a distinct semiprime: 748197661 = 53 ⋅14116937.

It is a cyclic number.

It is not a de Polignac number, because 166791847 - 2⁷ = 166791719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166791847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166791817) 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, 2875693 + ... + 2875750.

It is an arithmetic number, because the mean of its divisors is an integer number (43135830).

Almost surely, 2^166791847 is an apocalyptic number.

166791847 is a deficient number, since it is larger than the sum of its proper divisors (5751473).

166791847 is an equidigital number, since it uses as much as digits as its factorization.

166791847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751472.

The product of its digits is 508032, while the sum is 49.

The square root of 166791847 is about 12914.7917908110. The cubic root of 166791847 is about 550.4589524537.

The spelling of 166791847 in words is "one hundred sixty-six million, seven hundred ninety-one thousand, eight hundred forty-seven".