6446403752668 has 24 divisors (see below), whose sum is σ = 12338407776240. Its totient is φ = 2922650910720.

The previous prime is 6446403752653. The next prime is 6446403752669. The reversal of 6446403752668 is 8662573046446.

It is a super-2 number, since 2×6446403752668² (a number of 26 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446403752669) 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, 188298021 + ... + 188332252.

It is an arithmetic number, because the mean of its divisors is an integer number (514100324010).

Almost surely, 2^{6446403752668} is an apocalyptic number.

It is an amenable number.

6446403752668 is a deficient number, since it is larger than the sum of its proper divisors (5892004023572).

6446403752668 is a wasteful number, since it uses less digits than its factorization.

6446403752668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376630677 (or 376630675 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 61.

The spelling of 6446403752668 in words is "six trillion, four hundred forty-six billion, four hundred three million, seven hundred fifty-two thousand, six hundred sixty-eight".