66974093 has 2 divisors, whose sum is σ = 66974094. Its totient is φ = 66974092.

The previous prime is 66974077. The next prime is 66974099. The reversal of 66974093 is 39047966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60808804 + 6165289 = 7798^2 + 2483^2 .

It is a cyclic number.

It is not a de Polignac number, because 66974093 - 2⁴ = 66974077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66974099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33487046 + 33487047.

It is an arithmetic number, because the mean of its divisors is an integer number (33487047).

Almost surely, 2^66974093 is an apocalyptic number.

It is an amenable number.

66974093 is a deficient number, since it is larger than the sum of its proper divisors (1).

66974093 is an equidigital number, since it uses as much as digits as its factorization.

66974093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 66974093 is about 8183.7700969663. The cubic root of 66974093 is about 406.1024537800.

The spelling of 66974093 in words is "sixty-six million, nine hundred seventy-four thousand, ninety-three".