158428666 has 16 divisors (see below), whose sum is σ = 261629280. Its totient is φ = 71351280.

The previous prime is 158428663. The next prime is 158428667. The reversal of 158428666 is 666824851.

It is not an unprimeable number, because it can be changed into a prime (158428663) 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 7 ways as a sum of consecutive naturals, for example, 30636 + ... + 35431.

It is an arithmetic number, because the mean of its divisors is an integer number (16351830).

Almost surely, 2^158428666 is an apocalyptic number.

158428666 is a deficient number, since it is larger than the sum of its proper divisors (103200614).

158428666 is a wasteful number, since it uses less digits than its factorization.

158428666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66189.

The product of its digits is 552960, while the sum is 46.

The square root of 158428666 is about 12586.8449581299. The cubic root of 158428666 is about 541.1004832471.

It can be divided in two parts, 158 and 428666, that added together give a palindrome (428824).

The spelling of 158428666 in words is "one hundred fifty-eight million, four hundred twenty-eight thousand, six hundred sixty-six".