165656158 has 8 divisors (see below), whose sum is σ = 249524640. Its totient is φ = 82481280.

The previous prime is 165656147. The next prime is 165656159. The reversal of 165656158 is 851656561.

165656158 = T₄₂ + T₄₃ + ... + T₉₉₇.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165656159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172803 + ... + 173758.

It is an arithmetic number, because the mean of its divisors is an integer number (31190580).

Almost surely, 2^165656158 is an apocalyptic number.

165656158 is a deficient number, since it is larger than the sum of its proper divisors (83868482).

165656158 is a wasteful number, since it uses less digits than its factorization.

165656158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346802.

The product of its digits is 216000, while the sum is 43.

The square root of 165656158 is about 12870.7481523026. The cubic root of 165656158 is about 549.2067440534.

The spelling of 165656158 in words is "one hundred sixty-five million, six hundred fifty-six thousand, one hundred fifty-eight".