166435487 has 2 divisors, whose sum is σ = 166435488. Its totient is φ = 166435486.

The previous prime is 166435481. The next prime is 166435517. The reversal of 166435487 is 784534661.

It is a weak prime.

It is an emirp because it is prime and its reverse (784534661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166435487 - 2⁴ = 166435471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166435481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83217743 + 83217744.

It is an arithmetic number, because the mean of its divisors is an integer number (83217744).

Almost surely, 2^166435487 is an apocalyptic number.

166435487 is a deficient number, since it is larger than the sum of its proper divisors (1).

166435487 is an equidigital number, since it uses as much as digits as its factorization.

166435487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 44.

The square root of 166435487 is about 12900.9878303950. The cubic root of 166435487 is about 550.0666442659.

The spelling of 166435487 in words is "one hundred sixty-six million, four hundred thirty-five thousand, four hundred eighty-seven".