6694440144 has 80 divisors (see below), whose sum is σ = 19783340928. Its totient is φ = 1910877696.

The previous prime is 6694440121. The next prime is 6694440163. The reversal of 6694440144 is 4410444966.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 6694440096 and 6694440105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 366394 + ... + 384230.

Almost surely, 2^6694440144 is an apocalyptic number.

It is an amenable number.

6694440144 is an abundant number, since it is smaller than the sum of its proper divisors (13088900784).

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

6694440144 is a wasteful number, since it uses less digits than its factorization.

6694440144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18972 (or 18966 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The square root of 6694440144 is about 81819.5584441764. The cubic root of 6694440144 is about 1884.6820210045.

The spelling of 6694440144 in words is "six billion, six hundred ninety-four million, four hundred forty thousand, one hundred forty-four".