166829378 has 4 divisors (see below), whose sum is σ = 250244070. Its totient is φ = 83414688.

The previous prime is 166829363. The next prime is 166829407. The reversal of 166829378 is 873928661.

166829378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 873928661 = 449 ⋅1946389.

It can be written as a sum of positive squares in only one way, i.e., 122699929 + 44129449 = 11077^2 + 6643^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41707343 + ... + 41707346.

Almost surely, 2^166829378 is an apocalyptic number.

166829378 is a deficient number, since it is larger than the sum of its proper divisors (83414692).

166829378 is an equidigital number, since it uses as much as digits as its factorization.

166829378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83414691.

The product of its digits is 870912, while the sum is 50.

The square root of 166829378 is about 12916.2447328935. The cubic root of 166829378 is about 550.5002368968.

The spelling of 166829378 in words is "one hundred sixty-six million, eight hundred twenty-nine thousand, three hundred seventy-eight".