166507487 has 2 divisors, whose sum is σ = 166507488. Its totient is φ = 166507486.

The previous prime is 166507477. The next prime is 166507577. The reversal of 166507487 is 784705661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166507487 - 2⁶ = 166507423 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166507447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83253743 + 83253744.

It is an arithmetic number, because the mean of its divisors is an integer number (83253744).

Almost surely, 2^166507487 is an apocalyptic number.

166507487 is a deficient number, since it is larger than the sum of its proper divisors (1).

166507487 is an equidigital number, since it uses as much as digits as its factorization.

166507487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 166507487 is about 12903.7780126597. The cubic root of 166507487 is about 550.1459524500.

The spelling of 166507487 in words is "one hundred sixty-six million, five hundred seven thousand, four hundred eighty-seven".