166666668379 has 2 divisors, whose sum is σ = 166666668380. Its totient is φ = 166666668378.

The previous prime is 166666668341. The next prime is 166666668383. The reversal of 166666668379 is 973866666661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166666668379 - 2³⁵ = 132306930011 is a prime.

It is not a weakly prime, because it can be changed into another prime (166666668319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83333334189 + 83333334190.

It is an arithmetic number, because the mean of its divisors is an integer number (83333334190).

Almost surely, 2^166666668379 is an apocalyptic number.

166666668379 is a deficient number, since it is larger than the sum of its proper divisors (1).

166666668379 is an equidigital number, since it uses as much as digits as its factorization.

166666668379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423263232, while the sum is 70.

The spelling of 166666668379 in words is "one hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-eight thousand, three hundred seventy-nine".