165656151 has 16 divisors (see below), whose sum is σ = 246892800. Its totient is φ = 109773144.

The previous prime is 165656147. The next prime is 165656159. The reversal of 165656151 is 151656561.

It is not a de Polignac number, because 165656151 - 2² = 165656147 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 13861 + ... + 22878.

It is an arithmetic number, because the mean of its divisors is an integer number (15430800).

Almost surely, 2^165656151 is an apocalyptic number.

165656151 is a deficient number, since it is larger than the sum of its proper divisors (81236649).

165656151 is a wasteful number, since it uses less digits than its factorization.

165656151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36915 (or 36909 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 165656151 is about 12870.7478803681. The cubic root of 165656151 is about 549.2067363176.

The spelling of 165656151 in words is "one hundred sixty-five million, six hundred fifty-six thousand, one hundred fifty-one".