158668499 has 8 divisors (see below), whose sum is σ = 173358192. Its totient is φ = 144023040.

The previous prime is 158668453. The next prime is 158668501. The reversal of 158668499 is 994866851.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158668499 - 2¹² = 158664403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158628499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3314 + ... + 18119.

It is an arithmetic number, because the mean of its divisors is an integer number (21669774).

Almost surely, 2^158668499 is an apocalyptic number.

158668499 is a deficient number, since it is larger than the sum of its proper divisors (14689693).

158668499 is a wasteful number, since it uses less digits than its factorization.

158668499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22117.

The product of its digits is 3732480, while the sum is 56.

The square root of 158668499 is about 12596.3684846070. The cubic root of 158668499 is about 541.3733890826.

The spelling of 158668499 in words is "one hundred fifty-eight million, six hundred sixty-eight thousand, four hundred ninety-nine".