165291166 has 4 divisors (see below), whose sum is σ = 247936752. Its totient is φ = 82645582.

The previous prime is 165291149. The next prime is 165291193. The reversal of 165291166 is 661192561.

165291166 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 661192561 = 101 ⋅6546461.

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, 41322790 + ... + 41322793.

It is an arithmetic number, because the mean of its divisors is an integer number (61984188).

Almost surely, 2^165291166 is an apocalyptic number.

165291166 is a deficient number, since it is larger than the sum of its proper divisors (82645586).

165291166 is an equidigital number, since it uses as much as digits as its factorization.

165291166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82645585.

The product of its digits is 19440, while the sum is 37.

The square root of 165291166 is about 12856.5612043034. The cubic root of 165291166 is about 548.8030897347.

The spelling of 165291166 in words is "one hundred sixty-five million, two hundred ninety-one thousand, one hundred sixty-six".