166550158 has 4 divisors (see below), whose sum is σ = 249825240. Its totient is φ = 83275078.

The previous prime is 166550149. The next prime is 166550179. The reversal of 166550158 is 851055661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 851055661 = 8389 ⋅101449.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41637538 + ... + 41637541.

It is an arithmetic number, because the mean of its divisors is an integer number (62456310).

Almost surely, 2^166550158 is an apocalyptic number.

166550158 is a deficient number, since it is larger than the sum of its proper divisors (83275082).

166550158 is an equidigital number, since it uses as much as digits as its factorization.

166550158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83275081.

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 166550158 is about 12905.4313372316. The cubic root of 166550158 is about 550.1929438763.

The spelling of 166550158 in words is "one hundred sixty-six million, five hundred fifty thousand, one hundred fifty-eight".