2166747403571 has 2 divisors, whose sum is σ = 2166747403572. Its totient is φ = 2166747403570.

The previous prime is 2166747403559. The next prime is 2166747403631. The reversal of 2166747403571 is 1753047476612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166747403571 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2166747903571) 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 as a sum of consecutive naturals, namely, 1083373701785 + 1083373701786.

It is an arithmetic number, because the mean of its divisors is an integer number (1083373701786).

Almost surely, 2^{2166747403571} is an apocalyptic number.

2166747403571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166747403571 is an equidigital number, since it uses as much as digits as its factorization.

2166747403571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5927040, while the sum is 53.

The spelling of 2166747403571 in words is "two trillion, one hundred sixty-six billion, seven hundred forty-seven million, four hundred three thousand, five hundred seventy-one".