165696849 has 12 divisors (see below), whose sum is σ = 239675956. Its totient is φ = 110309472.

The previous prime is 165696847. The next prime is 165696857. The reversal of 165696849 is 948696561.

It is a happy number.

165696849 is a `hidden beast` number, since 16 + 569 + 68 + 4 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 137945025 + 27751824 = 11745^2 + 5268^2 .

It is not a de Polignac number, because 165696849 - 2¹ = 165696847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165696795 and 165696804.

It is not an unprimeable number, because it can be changed into a prime (165696847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5962 + ... + 19155.

Almost surely, 2^165696849 is an apocalyptic number.

It is an amenable number.

165696849 is a deficient number, since it is larger than the sum of its proper divisors (73979107).

165696849 is a wasteful number, since it uses less digits than its factorization.

165696849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25856 (or 25853 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 165696849 is about 12872.3288102814. The cubic root of 165696849 is about 549.2517085596.

The spelling of 165696849 in words is "one hundred sixty-five million, six hundred ninety-six thousand, eight hundred forty-nine".