166786849 has 4 divisors (see below), whose sum is σ = 167577520. Its totient is φ = 165996180.

The previous prime is 166786843. The next prime is 166786853. The reversal of 166786849 is 948687661.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 166786849 - 2⁵ = 166786817 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 166786849.

It is not an unprimeable number, because it can be changed into a prime (166786843) 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, 395019 + ... + 395440.

It is an arithmetic number, because the mean of its divisors is an integer number (41894380).

Almost surely, 2^166786849 is an apocalyptic number.

It is an amenable number.

166786849 is a deficient number, since it is larger than the sum of its proper divisors (790671).

166786849 is an equidigital number, since it uses as much as digits as its factorization.

166786849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790670.

The product of its digits is 3483648, while the sum is 55.

The square root of 166786849 is about 12914.5982903070. The cubic root of 166786849 is about 550.4534541407.

The spelling of 166786849 in words is "one hundred sixty-six million, seven hundred eighty-six thousand, eight hundred forty-nine".