165265556 has 12 divisors (see below), whose sum is σ = 290283840. Its totient is φ = 82327320.

The previous prime is 165265543. The next prime is 165265559. The reversal of 165265556 is 655562561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165265559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75146 + ... + 77313.

It is an arithmetic number, because the mean of its divisors is an integer number (24190320).

Almost surely, 2^165265556 is an apocalyptic number.

It is an amenable number.

165265556 is a deficient number, since it is larger than the sum of its proper divisors (125018284).

165265556 is a wasteful number, since it uses less digits than its factorization.

165265556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152734 (or 152732 counting only the distinct ones).

The product of its digits is 270000, while the sum is 41.

The square root of 165265556 is about 12855.5651762184. The cubic root of 165265556 is about 548.7747446566.

The spelling of 165265556 in words is "one hundred sixty-five million, two hundred sixty-five thousand, five hundred fifty-six".