6688660862446 has 16 divisors (see below), whose sum is σ = 10641662127360. Its totient is φ = 3144127442040.

The previous prime is 6688660862417. The next prime is 6688660862449. The reversal of 6688660862446 is 6442680668866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688660862449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671817126 + ... + 671827081.

It is an arithmetic number, because the mean of its divisors is an integer number (665103882960).

Almost surely, 2^{6688660862446} is an apocalyptic number.

6688660862446 is a deficient number, since it is larger than the sum of its proper divisors (3953001264914).

6688660862446 is a wasteful number, since it uses less digits than its factorization.

6688660862446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343644359.

The product of its (nonzero) digits is 764411904, while the sum is 70.

The spelling of 6688660862446 in words is "six trillion, six hundred eighty-eight billion, six hundred sixty million, eight hundred sixty-two thousand, four hundred forty-six".