165842722 has 4 divisors (see below), whose sum is σ = 248764086. Its totient is φ = 82921360.

The previous prime is 165842717. The next prime is 165842741. The reversal of 165842722 is 227248561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 227248561 = 37 ⋅6141853.

It can be written as a sum of positive squares in only one way, i.e., 146385801 + 19456921 = 12099^2 + 4411^2 .

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, 41460679 + ... + 41460682.

Almost surely, 2^165842722 is an apocalyptic number.

165842722 is a deficient number, since it is larger than the sum of its proper divisors (82921364).

165842722 is an equidigital number, since it uses as much as digits as its factorization.

165842722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82921363.

The product of its digits is 53760, while the sum is 37.

The square root of 165842722 is about 12877.9937102019. The cubic root of 165842722 is about 549.4128411635.

It can be divided in two parts, 16584 and 2722, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 165842722 in words is "one hundred sixty-five million, eight hundred forty-two thousand, seven hundred twenty-two".