6658972416 has 180 divisors, whose sum is σ = 20156411352. Its totient is φ = 2186072064.

The previous prime is 6658972381. The next prime is 6658972447. The reversal of 6658972416 is 6142798566.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1386916 + ... + 1391708.

Almost surely, 2^6658972416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6658972416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10078205676).

6658972416 is an abundant number, since it is smaller than the sum of its proper divisors (13497438936).

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

6658972416 is an equidigital number, since it uses as much as digits as its factorization.

6658972416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4888 (or 4865 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 6658972416 is about 81602.5270196947. The cubic root of 6658972416 is about 1881.3477223204.

The spelling of 6658972416 in words is "six billion, six hundred fifty-eight million, nine hundred seventy-two thousand, four hundred sixteen".