166787247 has 12 divisors (see below), whose sum is σ = 244438040. Its totient is φ = 101082960.

The previous prime is 166787233. The next prime is 166787279. The reversal of 166787247 is 742787661.

It is not a de Polignac number, because 166787247 - 2¹⁰ = 166786223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166787196 and 166787205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166787227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229372 + ... + 230097.

Almost surely, 2^166787247 is an apocalyptic number.

166787247 is a deficient number, since it is larger than the sum of its proper divisors (77650793).

166787247 is a wasteful number, since it uses less digits than its factorization.

166787247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459494 (or 459483 counting only the distinct ones).

The product of its digits is 790272, while the sum is 48.

The square root of 166787247 is about 12914.6136992169. The cubic root of 166787247 is about 550.4538919856.

The spelling of 166787247 in words is "one hundred sixty-six million, seven hundred eighty-seven thousand, two hundred forty-seven".