161707060 has 72 divisors (see below), whose sum is σ = 365622264. Its totient is φ = 60057600.

The previous prime is 161707033. The next prime is 161707061. The reversal of 161707060 is 60707161.

It can be written as a sum of positive squares in 12 ways, for example, as 467856 + 161239204 = 684^2 + 12698^2 .

It is a super-2 number, since 2×161707060² = 52298346507687200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161707061) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 583642 + ... + 583918.

It is an arithmetic number, because the mean of its divisors is an integer number (5078087).

Almost surely, 2^161707060 is an apocalyptic number.

161707060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161707060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182811132).

161707060 is an abundant number, since it is smaller than the sum of its proper divisors (203915204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161707060 is a wasteful number, since it uses less digits than its factorization.

161707060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 161707060 is about 12716.4090843288. The cubic root of 161707060 is about 544.8073948365.

The spelling of 161707060 in words is "one hundred sixty-one million, seven hundred seven thousand, sixty".