6906666673440 has 144 divisors (see below), whose sum is σ = 23569753491648. Its totient is φ = 1841718901248.

The previous prime is 6906666673393. The next prime is 6906666673457. The reversal of 6906666673440 is 443766666096.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62992747 + ... + 63102293.

It is an arithmetic number, because the mean of its divisors is an integer number (163678843692).

Almost surely, 2^{6906666673440} is an apocalyptic number.

6906666673440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6906666673440 is an abundant number, since it is smaller than the sum of its proper divisors (16663086818208).

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

6906666673440 is a wasteful number, since it uses less digits than its factorization.

6906666673440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153351 (or 153340 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 63.

The spelling of 6906666673440 in words is "six trillion, nine hundred six billion, six hundred sixty-six million, six hundred seventy-three thousand, four hundred forty".