6478665884 has 24 divisors (see below), whose sum is σ = 11427710448. Its totient is φ = 3213636480.

The previous prime is 6478665883. The next prime is 6478665901. The reversal of 6478665884 is 4885668746.

It is a super-2 number, since 2×6478665884² = 83946223273011002912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478665883) 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, 1214447 + ... + 1219769.

It is an arithmetic number, because the mean of its divisors is an integer number (476154602).

Almost surely, 2^6478665884 is an apocalyptic number.

It is an amenable number.

6478665884 is a deficient number, since it is larger than the sum of its proper divisors (4949044564).

6478665884 is a wasteful number, since it uses less digits than its factorization.

6478665884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7685 (or 7683 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 62.

The square root of 6478665884 is about 80490.1601688057. The cubic root of 6478665884 is about 1864.2115500809.

The spelling of 6478665884 in words is "six billion, four hundred seventy-eight million, six hundred sixty-five thousand, eight hundred eighty-four".