6426667520 has 320 divisors, whose sum is σ = 19386259200. Its totient is φ = 2030321664.

The previous prime is 6426667501. The next prime is 6426667547. The reversal of 6426667520 is 257666246.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11414759 + ... + 11415321.

It is an arithmetic number, because the mean of its divisors is an integer number (60582060).

Almost surely, 2^6426667520 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 6426667520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9693129600).

6426667520 is an abundant number, since it is smaller than the sum of its proper divisors (12959591680).

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

6426667520 is an equidigital number, since it uses as much as digits as its factorization.

6426667520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 590 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The square root of 6426667520 is about 80166.4987385629. The cubic root of 6426667520 is about 1859.2107029916.

The spelling of 6426667520 in words is "six billion, four hundred twenty-six million, six hundred sixty-seven thousand, five hundred twenty".