1666867036667 has 16 divisors (see below), whose sum is σ = 1906488047040. Its totient is φ = 1427620626432.

The previous prime is 1666867036651. The next prime is 1666867036673. The reversal of 1666867036667 is 7666307686661.

It is not a de Polignac number, because 1666867036667 - 2⁴ = 1666867036651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1666867036597 and 1666867036606.

It is not an unprimeable number, because it can be changed into a prime (1666867036867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121405259 + ... + 121418987.

It is an arithmetic number, because the mean of its divisors is an integer number (119155502940).

Almost surely, 2^{1666867036667} is an apocalyptic number.

1666867036667 is a deficient number, since it is larger than the sum of its proper divisors (239621010373).

1666867036667 is a wasteful number, since it uses less digits than its factorization.

1666867036667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26102.

The product of its (nonzero) digits is 329204736, while the sum is 68.

The spelling of 1666867036667 in words is "one trillion, six hundred sixty-six billion, eight hundred sixty-seven million, thirty-six thousand, six hundred sixty-seven".