66458773 has 2 divisors, whose sum is σ = 66458774. Its totient is φ = 66458772.

The previous prime is 66458747. The next prime is 66458783. The reversal of 66458773 is 37785466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66210769 + 248004 = 8137^2 + 498^2 .

It is a cyclic number.

It is not a de Polignac number, because 66458773 - 2⁵ = 66458741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66458723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33229386 + 33229387.

It is an arithmetic number, because the mean of its divisors is an integer number (33229387).

Almost surely, 2^66458773 is an apocalyptic number.

It is an amenable number.

66458773 is a deficient number, since it is larger than the sum of its proper divisors (1).

66458773 is an equidigital number, since it uses as much as digits as its factorization.

66458773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 46.

The square root of 66458773 is about 8152.2250336948. The cubic root of 66458773 is about 405.0582104005.

The spelling of 66458773 in words is "sixty-six million, four hundred fifty-eight thousand, seven hundred seventy-three".