158997166 has 4 divisors (see below), whose sum is σ = 238495752. Its totient is φ = 79498582.

The previous prime is 158997161. The next prime is 158997173. The reversal of 158997166 is 661799851.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158997161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39749290 + ... + 39749293.

It is an arithmetic number, because the mean of its divisors is an integer number (59623938).

Almost surely, 2^158997166 is an apocalyptic number.

158997166 is a deficient number, since it is larger than the sum of its proper divisors (79498586).

158997166 is an equidigital number, since it uses as much as digits as its factorization.

158997166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79498585.

The product of its digits is 816480, while the sum is 52.

The square root of 158997166 is about 12609.4078370080. The cubic root of 158997166 is about 541.7469327785.

The spelling of 158997166 in words is "one hundred fifty-eight million, nine hundred ninety-seven thousand, one hundred sixty-six".