161665048 has 16 divisors (see below), whose sum is σ = 304278480. Its totient is φ = 80524128.

The previous prime is 161665039. The next prime is 161665051. The reversal of 161665048 is 840566161.

161665048 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161665048² = 52271175489684608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161664998 and 161665016.

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, 36315 + ... + 40522.

It is an arithmetic number, because the mean of its divisors is an integer number (19017405).

Almost surely, 2^161665048 is an apocalyptic number.

It is an amenable number.

161665048 is a deficient number, since it is larger than the sum of its proper divisors (142613432).

161665048 is a wasteful number, since it uses less digits than its factorization.

161665048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77106 (or 77102 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 161665048 is about 12714.7570955957. The cubic root of 161665048 is about 544.7602098616.

The spelling of 161665048 in words is "one hundred sixty-one million, six hundred sixty-five thousand, forty-eight".