166378458 has 32 divisors (see below), whose sum is σ = 349195392. Its totient is φ = 52747200.

The previous prime is 166378453. The next prime is 166378483. The reversal of 166378458 is 854873661.

It is not an unprimeable number, because it can be changed into a prime (166378453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21648 + ... + 28308.

It is an arithmetic number, because the mean of its divisors is an integer number (10912356).

Almost surely, 2^166378458 is an apocalyptic number.

166378458 is an abundant number, since it is smaller than the sum of its proper divisors (182816934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166378458 is a wasteful number, since it uses less digits than its factorization.

166378458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6870.

The product of its digits is 967680, while the sum is 48.

The square root of 166378458 is about 12898.7773839229. Note that the first 3 decimals coincide. The cubic root of 166378458 is about 550.0038104419.

The spelling of 166378458 in words is "one hundred sixty-six million, three hundred seventy-eight thousand, four hundred fifty-eight".