166487473 has 2 divisors, whose sum is σ = 166487474. Its totient is φ = 166487472.

The previous prime is 166487441. The next prime is 166487509. The reversal of 166487473 is 374784661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166487409 + 64 = 12903^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 166487473 - 2⁵ = 166487441 is a prime.

It is not a weakly prime, because it can be changed into another prime (166484473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83243736 + 83243737.

It is an arithmetic number, because the mean of its divisors is an integer number (83243737).

Almost surely, 2^166487473 is an apocalyptic number.

It is an amenable number.

166487473 is a deficient number, since it is larger than the sum of its proper divisors (1).

166487473 is an equidigital number, since it uses as much as digits as its factorization.

166487473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 46.

The square root of 166487473 is about 12903.0024800432. The cubic root of 166487473 is about 550.1239092725.

The spelling of 166487473 in words is "one hundred sixty-six million, four hundred eighty-seven thousand, four hundred seventy-three".