166242679 has 2 divisors, whose sum is σ = 166242680. Its totient is φ = 166242678.

The previous prime is 166242631. The next prime is 166242683. The reversal of 166242679 is 976242661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166242679 - 2¹³ = 166234487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166242179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83121339 + 83121340.

It is an arithmetic number, because the mean of its divisors is an integer number (83121340).

Almost surely, 2^166242679 is an apocalyptic number.

166242679 is a deficient number, since it is larger than the sum of its proper divisors (1).

166242679 is an equidigital number, since it uses as much as digits as its factorization.

166242679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 166242679 is about 12893.5130588990. The cubic root of 166242679 is about 549.8541530638.

The spelling of 166242679 in words is "one hundred sixty-six million, two hundred forty-two thousand, six hundred seventy-nine".