6446620412066 has 8 divisors (see below), whose sum is σ = 9671028626880. Its totient is φ = 3222944203108.

The previous prime is 6446620412051. The next prime is 6446620412083. The reversal of 6446620412066 is 6602140266446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6446620412066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182979446 + ... + 183014673.

It is an arithmetic number, because the mean of its divisors is an integer number (1208878578360).

Almost surely, 2^{6446620412066} is an apocalyptic number.

6446620412066 is a deficient number, since it is larger than the sum of its proper divisors (3224408214814).

6446620412066 is a wasteful number, since it uses less digits than its factorization.

6446620412066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366002928.

The product of its (nonzero) digits is 1990656, while the sum is 47.

The spelling of 6446620412066 in words is "six trillion, four hundred forty-six billion, six hundred twenty million, four hundred twelve thousand, sixty-six".