161670330 has 112 divisors (see below), whose sum is σ = 444160224. Its totient is φ = 42340320.

The previous prime is 161670329. The next prime is 161670347. The reversal of 161670330 is 33076161.

161670330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161670330² = 52274591204617800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 161670294 and 161670303.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 488265 + ... + 488595.

Almost surely, 2^161670330 is an apocalyptic number.

161670330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161670330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222080112).

161670330 is an abundant number, since it is smaller than the sum of its proper divisors (282489894).

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

161670330 is an equidigital number, since it uses as much as digits as its factorization.

161670330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 161670330 is about 12714.9648052993. The cubic root of 161670330 is about 544.7661426882.

The spelling of 161670330 in words is "one hundred sixty-one million, six hundred seventy thousand, three hundred thirty".