6663671280 has 320 divisors, whose sum is σ = 26792570880. Its totient is φ = 1490558976.

The previous prime is 6663671213. The next prime is 6663671321. The reversal of 6663671280 is 821763666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 705952 + ... + 715328.

It is an arithmetic number, because the mean of its divisors is an integer number (83726784).

Almost surely, 2^6663671280 is an apocalyptic number.

6663671280 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 6663671280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13396285440).

6663671280 is an abundant number, since it is smaller than the sum of its proper divisors (20128899600).

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

6663671280 is a wasteful number, since it uses less digits than its factorization.

6663671280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9453 (or 9441 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 6663671280 is about 81631.3131096150. The cubic root of 6663671280 is about 1881.7901388577.

The spelling of 6663671280 in words is "six billion, six hundred sixty-three million, six hundred seventy-one thousand, two hundred eighty".