161666760 has 32 divisors (see below), whose sum is σ = 485000640. Its totient is φ = 43111104.

The previous prime is 161666717. The next prime is 161666777. The reversal of 161666760 is 67666161.

161666760 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 2×161666760² = 52272282577795200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 673492 + ... + 673731.

It is an arithmetic number, because the mean of its divisors is an integer number (15156270).

Almost surely, 2^161666760 is an apocalyptic number.

161666760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161666760 is an abundant number, since it is smaller than the sum of its proper divisors (323333880).

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

161666760 is a wasteful number, since it uses less digits than its factorization.

161666760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347237 (or 1347233 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 161666760 is about 12714.8244187641. The cubic root of 161666760 is about 544.7621328214.

The spelling of 161666760 in words is "one hundred sixty-one million, six hundred sixty-six thousand, seven hundred sixty".