1006661666139 has 4 divisors (see below), whose sum is σ = 1342215554856. Its totient is φ = 671107777424.

The previous prime is 1006661666117. The next prime is 1006661666149. The reversal of 1006661666139 is 9316661666001.

1006661666139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1006661666139 - 2⁹ = 1006661665627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1006661666091 and 1006661666100.

It is not an unprimeable number, because it can be changed into a prime (1006661666149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167776944354 + ... + 167776944359.

It is an arithmetic number, because the mean of its divisors is an integer number (335553888714).

Almost surely, 2^{1006661666139} is an apocalyptic number.

1006661666139 is a deficient number, since it is larger than the sum of its proper divisors (335553888717).

1006661666139 is an equidigital number, since it uses as much as digits as its factorization.

1006661666139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335553888716.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The spelling of 1006661666139 in words is "one trillion, six billion, six hundred sixty-one million, six hundred sixty-six thousand, one hundred thirty-nine".