165835856 has 20 divisors (see below), whose sum is σ = 324622452. Its totient is φ = 82062336.

The previous prime is 165835847. The next prime is 165835861. The reversal of 165835856 is 658538561.

It can be written as a sum of positive squares in 2 ways, for example, as 36240400 + 129595456 = 6020^2 + 11384^2 .

It is a super-2 number, since 2×165835856² = 55003062270505472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 165835856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51875 + ... + 54978.

Almost surely, 2^165835856 is an apocalyptic number.

165835856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165835856 is a deficient number, since it is larger than the sum of its proper divisors (158786596).

165835856 is a wasteful number, since it uses less digits than its factorization.

165835856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106958 (or 106952 counting only the distinct ones).

The product of its digits is 864000, while the sum is 47.

The square root of 165835856 is about 12877.7271286512. The cubic root of 165835856 is about 549.4052590387.

The spelling of 165835856 in words is "one hundred sixty-five million, eight hundred thirty-five thousand, eight hundred fifty-six".