6694427520 has 512 divisors, whose sum is σ = 26526528000. Its totient is φ = 1581465600.

The previous prime is 6694427477. The next prime is 6694427573. The reversal of 6694427520 is 257244966.

6694427520 is a `hidden beast` number, since 6 + 69 + 44 + 27 + 520 = 666.

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, 7792851 + ... + 7793709.

It is an arithmetic number, because the mean of its divisors is an integer number (51809625).

Almost surely, 2^6694427520 is an apocalyptic number.

6694427520 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 6694427520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13263264000).

6694427520 is an abundant number, since it is smaller than the sum of its proper divisors (19832100480).

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

6694427520 is a wasteful number, since it uses less digits than its factorization.

6694427520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 921 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 6694427520 is about 81819.4812987714. The cubic root of 6694427520 is about 1884.6808363279.

The spelling of 6694427520 in words is "six billion, six hundred ninety-four million, four hundred twenty-seven thousand, five hundred twenty".