6497402446668 has 90 divisors (see below), whose sum is σ = 17687498777396. Its totient is φ = 1856277079104.

The previous prime is 6497402446663. The next prime is 6497402446681. The reversal of 6497402446668 is 8666442047946.

It is a junction number, because it is equal to n+sod(n) for n = 6497402446599 and 6497402446608.

It is not an unprimeable number, because it can be changed into a prime (6497402446663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 432662296 + ... + 432677312.

Almost surely, 2^{6497402446668} 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 6497402446668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8843749388698).

6497402446668 is an abundant number, since it is smaller than the sum of its proper divisors (11190096330728).

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

6497402446668 is an frugal number, since it uses more digits than its factorization.

6497402446668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30069 (or 15029 counting only the distinct ones).

The product of its (nonzero) digits is 334430208, while the sum is 66.

The spelling of 6497402446668 in words is "six trillion, four hundred ninety-seven billion, four hundred two million, four hundred forty-six thousand, six hundred sixty-eight".