158241866 has 4 divisors (see below), whose sum is σ = 237362802. Its totient is φ = 79120932.

The previous prime is 158241857. The next prime is 158241877. The reversal of 158241866 is 668142851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 668142851 = 4919 ⋅135829.

It can be written as a sum of positive squares in only one way, i.e., 146918641 + 11323225 = 12121^2 + 3365^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39560465 + ... + 39560468.

Almost surely, 2^158241866 is an apocalyptic number.

158241866 is a deficient number, since it is larger than the sum of its proper divisors (79120936).

158241866 is an equidigital number, since it uses as much as digits as its factorization.

158241866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79120935.

The product of its digits is 92160, while the sum is 41.

The square root of 158241866 is about 12579.4223237794. The cubic root of 158241866 is about 540.8877327708.

The spelling of 158241866 in words is "one hundred fifty-eight million, two hundred forty-one thousand, eight hundred sixty-six".