161660125 has 16 divisors (see below), whose sum is σ = 220094784. Its totient is φ = 117570000.

The previous prime is 161660111. The next prime is 161660131. The reversal of 161660125 is 521066161.

It is not a de Polignac number, because 161660125 - 2¹⁹ = 161135837 is a prime.

It is a super-2 number, since 2×161660125² = 52267992030031250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161660093 and 161660102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57411 + ... + 60160.

It is an arithmetic number, because the mean of its divisors is an integer number (13755924).

Almost surely, 2^161660125 is an apocalyptic number.

It is an amenable number.

161660125 is a deficient number, since it is larger than the sum of its proper divisors (58434659).

161660125 is a wasteful number, since it uses less digits than its factorization.

161660125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117597 (or 117587 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 161660125 is about 12714.5635001757. The cubic root of 161660125 is about 544.7546801532.

The spelling of 161660125 in words is "one hundred sixty-one million, six hundred sixty thousand, one hundred twenty-five".