1663944282 has 320 divisors, whose sum is σ = 5183152128. Its totient is φ = 384912000.

The previous prime is 1663944257. The next prime is 1663944283. The reversal of 1663944282 is 2824493661.

1663944282 is a `hidden beast` number, since 1 + 6 + 639 + 4 + 4 + 2 + 8 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1663944283) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 5026857 + ... + 5027187.

Almost surely, 2^1663944282 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663944282, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2591576064).

1663944282 is an abundant number, since it is smaller than the sum of its proper divisors (3519207846).

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

1663944282 is a wasteful number, since it uses less digits than its factorization.

1663944282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 398 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 1663944282 is about 40791.4731530990. The cubic root of 1663944282 is about 1184.9852009047.

The spelling of 1663944282 in words is "one billion, six hundred sixty-three million, nine hundred forty-four thousand, two hundred eighty-two".