166487870 has 8 divisors (see below), whose sum is σ = 299678184. Its totient is φ = 66595144.

The previous prime is 166487863. The next prime is 166487879. The reversal of 166487870 is 78784661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166487879) 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 3 ways as a sum of consecutive naturals, for example, 8324384 + ... + 8324403.

It is an arithmetic number, because the mean of its divisors is an integer number (37459773).

Almost surely, 2^166487870 is an apocalyptic number.

166487870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166487870 is a deficient number, since it is larger than the sum of its proper divisors (133190314).

166487870 is a wasteful number, since it uses less digits than its factorization.

166487870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16648794.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 166487870 is about 12903.0178640503. The cubic root of 166487870 is about 550.1243465407.

The spelling of 166487870 in words is "one hundred sixty-six million, four hundred eighty-seven thousand, eight hundred seventy".