166987474 has 8 divisors (see below), whose sum is σ = 252453888. Its totient is φ = 82836180.

The previous prime is 166987463. The next prime is 166987477. The reversal of 166987474 is 474789661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (166987477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328462 + ... + 328969.

It is an arithmetic number, because the mean of its divisors is an integer number (31556736).

Almost surely, 2^166987474 is an apocalyptic number.

166987474 is a deficient number, since it is larger than the sum of its proper divisors (85466414).

166987474 is a wasteful number, since it uses less digits than its factorization.

166987474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657560.

The product of its digits is 2032128, while the sum is 52.

The square root of 166987474 is about 12922.3633287414. The cubic root of 166987474 is about 550.6740759992.

The spelling of 166987474 in words is "one hundred sixty-six million, nine hundred eighty-seven thousand, four hundred seventy-four".