166231849 has 4 divisors (see below), whose sum is σ = 189979264. Its totient is φ = 142484436.

The previous prime is 166231843. The next prime is 166231853. The reversal of 166231849 is 948132661.

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 166231849 - 2¹¹ = 166229801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166231843) 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, 11873697 + ... + 11873710.

It is an arithmetic number, because the mean of its divisors is an integer number (47494816).

Almost surely, 2^166231849 is an apocalyptic number.

It is an amenable number.

166231849 is a deficient number, since it is larger than the sum of its proper divisors (23747415).

166231849 is an equidigital number, since it uses as much as digits as its factorization.

166231849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23747414.

The product of its digits is 62208, while the sum is 40.

The square root of 166231849 is about 12893.0930734250. The cubic root of 166231849 is about 549.8422125885.

The spelling of 166231849 in words is "one hundred sixty-six million, two hundred thirty-one thousand, eight hundred forty-nine".