1661828804 has 24 divisors (see below), whose sum is σ = 2995500480. Its totient is φ = 806102496.

The previous prime is 1661828801. The next prime is 1661828809. The reversal of 1661828804 is 4088281661.

It is not an unprimeable number, because it can be changed into a prime (1661828801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35177 + ... + 67535.

It is an arithmetic number, because the mean of its divisors is an integer number (124812520).

Almost surely, 2^1661828804 is an apocalyptic number.

It is an amenable number.

1661828804 is a deficient number, since it is larger than the sum of its proper divisors (1333671676).

1661828804 is a wasteful number, since it uses less digits than its factorization.

1661828804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32747 (or 32745 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 1661828804 is about 40765.5345113982. The cubic root of 1661828804 is about 1184.4828056309.

The spelling of 1661828804 in words is "one billion, six hundred sixty-one million, eight hundred twenty-eight thousand, eight hundred four".