1661960304 has 120 divisors (see below), whose sum is σ = 4845672000. Its totient is φ = 531095040.

The previous prime is 1661960291. The next prime is 1661960347. The reversal of 1661960304 is 4030691661.

1661960304 is a `hidden beast` number, since 1 + 6 + 619 + 6 + 0 + 30 + 4 = 666.

It is a super-2 number, since 2×1661960304² = 5524224104143544832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 620889 + ... + 623559.

It is an arithmetic number, because the mean of its divisors is an integer number (40380600).

Almost surely, 2^1661960304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1661960304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2422836000).

1661960304 is an abundant number, since it is smaller than the sum of its proper divisors (3183711696).

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

1661960304 is a wasteful number, since it uses less digits than its factorization.

1661960304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863 (or 2854 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1661960304 is about 40767.1473615704. The cubic root of 1661960304 is about 1184.5140473931.

The spelling of 1661960304 in words is "one billion, six hundred sixty-one million, nine hundred sixty thousand, three hundred four".