161301660 has 96 divisors (see below), whose sum is σ = 489065472. Its totient is φ = 39486720.

The previous prime is 161301653. The next prime is 161301677. The reversal of 161301660 is 66103161.

It is a self number, because there is not a number n which added to its sum of digits gives 161301660.

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 31 ways as a sum of consecutive naturals, for example, 176605 + ... + 177515.

It is an arithmetic number, because the mean of its divisors is an integer number (5094432).

Almost surely, 2^161301660 is an apocalyptic number.

161301660 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 161301660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244532736).

161301660 is an abundant number, since it is smaller than the sum of its proper divisors (327763812).

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

161301660 is a wasteful number, since it uses less digits than its factorization.

161301660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163 (or 1161 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 161301660 is about 12700.4590468219. The cubic root of 161301660 is about 544.3517360154.

The spelling of 161301660 in words is "one hundred sixty-one million, three hundred one thousand, six hundred sixty".