66003793 has 2 divisors, whose sum is σ = 66003794. Its totient is φ = 66003792.

The previous prime is 66003787. The next prime is 66003799. The reversal of 66003793 is 39730066.

It is a balanced prime because it is at equal distance from previous prime (66003787) and next prime (66003799).

It can be written as a sum of positive squares in only one way, i.e., 64448784 + 1555009 = 8028^2 + 1247^2 .

It is a cyclic number.

It is not a de Polignac number, because 66003793 - 2¹⁷ = 65872721 is a prime.

It is equal to p_3896350 and since 66003793 and 3896350 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (66003799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33001896 + 33001897.

It is an arithmetic number, because the mean of its divisors is an integer number (33001897).

Almost surely, 2^66003793 is an apocalyptic number.

It is an amenable number.

66003793 is a deficient number, since it is larger than the sum of its proper divisors (1).

66003793 is an equidigital number, since it uses as much as digits as its factorization.

66003793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 34.

The square root of 66003793 is about 8124.2718442947. The cubic root of 66003793 is about 404.1317435419.

The spelling of 66003793 in words is "sixty-six million, three thousand, seven hundred ninety-three".