6663990960 has 320 divisors, whose sum is σ = 25243384320. Its totient is φ = 1602432000.

The previous prime is 6663990937. The next prime is 6663991027. The reversal of 6663990960 is 690993666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 6663990897 and 6663990906.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3111490 + ... + 3113630.

It is an arithmetic number, because the mean of its divisors is an integer number (78885576).

Almost surely, 2^6663990960 is an apocalyptic number.

6663990960 is a gapful number since it is divisible by the number (60) 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 6663990960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12621692160).

6663990960 is an abundant number, since it is smaller than the sum of its proper divisors (18579393360).

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

6663990960 is a wasteful number, since it uses less digits than its factorization.

6663990960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305 (or 2293 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 54.

The square root of 6663990960 is about 81633.2711582722. The cubic root of 6663990960 is about 1881.8202304306.

The spelling of 6663990960 in words is "six billion, six hundred sixty-three million, nine hundred ninety thousand, nine hundred sixty".