6694578072 has 576 divisors, whose sum is σ = 24172162560. Its totient is φ = 1698278400.

The previous prime is 6694578071. The next prime is 6694578073. The reversal of 6694578072 is 2708754966.

6694578072 is a `hidden beast` number, since 6 + 69 + 4 + 578 + 0 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (6694578071) and next prime (6694578073).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6694578071) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 94289797 + ... + 94289867.

It is an arithmetic number, because the mean of its divisors is an integer number (41965560).

Almost surely, 2^6694578072 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 6694578072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12086081280).

6694578072 is an abundant number, since it is smaller than the sum of its proper divisors (17477584488).

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

6694578072 is a wasteful number, since it uses less digits than its factorization.

6694578072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The square root of 6694578072 is about 81820.4013189865. The cubic root of 6694578072 is about 1884.6949645134.

The spelling of 6694578072 in words is "six billion, six hundred ninety-four million, five hundred seventy-eight thousand, seventy-two".