6420674304 has 324 divisors, whose sum is σ = 21126706328. Its totient is φ = 1943377920.

The previous prime is 6420674297. The next prime is 6420674317. The reversal of 6420674304 is 4034760246.

6420674304 is a `hidden beast` number, since 642 + 0 + 6 + 7 + 4 + 3 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (324).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7526742 + ... + 7527594.

Almost surely, 2^6420674304 is an apocalyptic number.

6420674304 is a gapful number since it is divisible by the number (64) 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 6420674304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10563353164).

6420674304 is an abundant number, since it is smaller than the sum of its proper divisors (14706032024).

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

6420674304 is an equidigital number, since it uses as much as digits as its factorization.

6420674304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The square root of 6420674304 is about 80129.1102159509. The cubic root of 6420674304 is about 1858.6325849751.

The spelling of 6420674304 in words is "six billion, four hundred twenty million, six hundred seventy-four thousand, three hundred four".