161660056 has 16 divisors (see below), whose sum is σ = 319066200. Its totient is φ = 76575744.

The previous prime is 161660047. The next prime is 161660099. The reversal of 161660056 is 650066161.

It is a super-2 number, since 2×161660056² = 52267947411846272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531625 + ... + 531928.

Almost surely, 2^161660056 is an apocalyptic number.

It is an amenable number.

161660056 is a deficient number, since it is larger than the sum of its proper divisors (157406144).

161660056 is a wasteful number, since it uses less digits than its factorization.

161660056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063578 (or 1063574 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 161660056 is about 12714.5607867515. The cubic root of 161660056 is about 544.7546026488.

The spelling of 161660056 in words is "one hundred sixty-one million, six hundred sixty thousand, fifty-six".