1670201866691 has 2 divisors, whose sum is σ = 1670201866692. Its totient is φ = 1670201866690.

The previous prime is 1670201866643. The next prime is 1670201866789. The reversal of 1670201866691 is 1966681020761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1670201866691 - 2¹⁰ = 1670201865667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1670201866601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835100933345 + 835100933346.

It is an arithmetic number, because the mean of its divisors is an integer number (835100933346).

Almost surely, 2^{1670201866691} is an apocalyptic number.

1670201866691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670201866691 is an equidigital number, since it uses as much as digits as its factorization.

1670201866691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 1670201866691 in words is "one trillion, six hundred seventy billion, two hundred one million, eight hundred sixty-six thousand, six hundred ninety-one".