1666055006005 has 12 divisors (see below), whose sum is σ = 2164885677540. Its totient is φ = 1230317542272.

The previous prime is 1666055005987. The next prime is 1666055006023. The reversal of 1666055006005 is 5006005506661.

It is an interprime number because it is at equal distance from previous prime (1666055005987) and next prime (1666055006023).

It can be written as a sum of positive squares in 6 ways, for example, as 653990837809 + 1012064168196 = 808697^2 + 1006014^2 .

It is not a de Polignac number, because 1666055006005 - 2⁵ = 1666055005973 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 985830520 + ... + 985832209.

It is an arithmetic number, because the mean of its divisors is an integer number (180407139795).

Almost surely, 2^{1666055006005} is an apocalyptic number.

It is an amenable number.

1666055006005 is a deficient number, since it is larger than the sum of its proper divisors (498830671535).

1666055006005 is a wasteful number, since it uses less digits than its factorization.

1666055006005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971662760 (or 1971662747 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 1666055006005 in words is "one trillion, six hundred sixty-six billion, fifty-five million, six thousand, five".