6647605858001 has 2 divisors, whose sum is σ = 6647605858002. Its totient is φ = 6647605858000.

The previous prime is 6647605857989. The next prime is 6647605858007. The reversal of 6647605858001 is 1008585067466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5547626515600 + 1099979342401 = 2355340^2 + 1048799^2 .

It is a cyclic number.

It is not a de Polignac number, because 6647605858001 - 2¹⁸ = 6647605595857 is a prime.

It is a super-2 number, since 2×6647605858001² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6647605858007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323802929000 + 3323802929001.

It is an arithmetic number, because the mean of its divisors is an integer number (3323802929001).

Almost surely, 2^{6647605858001} is an apocalyptic number.

It is an amenable number.

6647605858001 is a deficient number, since it is larger than the sum of its proper divisors (1).

6647605858001 is an equidigital number, since it uses as much as digits as its factorization.

6647605858001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9676800, while the sum is 56.

The spelling of 6647605858001 in words is "six trillion, six hundred forty-seven billion, six hundred five million, eight hundred fifty-eight thousand, one".