166678882 has 4 divisors (see below), whose sum is σ = 250018326. Its totient is φ = 83339440.

The previous prime is 166678871. The next prime is 166678913. The reversal of 166678882 is 288876661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 288876661 = 9521 ⋅30341.

It can be written as a sum of positive squares in only one way, i.e., 123632161 + 43046721 = 11119^2 + 6561^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41669719 + ... + 41669722.

Almost surely, 2^166678882 is an apocalyptic number.

166678882 is a deficient number, since it is larger than the sum of its proper divisors (83339444).

166678882 is an equidigital number, since it uses as much as digits as its factorization.

166678882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83339443.

The product of its digits is 1548288, while the sum is 52.

The square root of 166678882 is about 12910.4175765155. The cubic root of 166678882 is about 550.3346525347.

The spelling of 166678882 in words is "one hundred sixty-six million, six hundred seventy-eight thousand, eight hundred eighty-two".