166674797 has 2 divisors, whose sum is σ = 166674798. Its totient is φ = 166674796.

The previous prime is 166674779. The next prime is 166674913. The reversal of 166674797 is 797476661.

Together with previous prime (166674779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111112681 + 55562116 = 10541^2 + 7454^2 .

It is a cyclic number.

It is not a de Polignac number, because 166674797 - 2²⁴ = 149897581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166674757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83337398 + 83337399.

It is an arithmetic number, because the mean of its divisors is an integer number (83337399).

Almost surely, 2^166674797 is an apocalyptic number.

It is an amenable number.

166674797 is a deficient number, since it is larger than the sum of its proper divisors (1).

166674797 is an equidigital number, since it uses as much as digits as its factorization.

166674797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 53.

The square root of 166674797 is about 12910.2593699739. The cubic root of 166674797 is about 550.3301565933.

The spelling of 166674797 in words is "one hundred sixty-six million, six hundred seventy-four thousand, seven hundred ninety-seven".