1661932320 has 192 divisors, whose sum is σ = 5487906816. Its totient is φ = 422231040.

The previous prime is 1661932313. The next prime is 1661932339. The reversal of 1661932320 is 232391661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 996127 + ... + 997793.

It is an arithmetic number, because the mean of its divisors is an integer number (28582848).

Almost surely, 2^1661932320 is an apocalyptic number.

1661932320 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 1661932320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2743953408).

1661932320 is an abundant number, since it is smaller than the sum of its proper divisors (3825974496).

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

1661932320 is a wasteful number, since it uses less digits than its factorization.

1661932320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783 (or 1775 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 1661932320 is about 40766.8041425864. The cubic root of 1661932320 is about 1184.5073990941.

The spelling of 1661932320 in words is "one billion, six hundred sixty-one million, nine hundred thirty-two thousand, three hundred twenty".