66362993 has 2 divisors, whose sum is σ = 66362994. Its totient is φ = 66362992.

The previous prime is 66362987. The next prime is 66363001. The reversal of 66362993 is 39926366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57410929 + 8952064 = 7577^2 + 2992^2 .

It is a cyclic number.

It is not a de Polignac number, because 66362993 - 2⁴ = 66362977 is a prime.

It is not a weakly prime, because it can be changed into another prime (66362983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33181496 + 33181497.

It is an arithmetic number, because the mean of its divisors is an integer number (33181497).

Almost surely, 2^66362993 is an apocalyptic number.

It is an amenable number.

66362993 is a deficient number, since it is larger than the sum of its proper divisors (1).

66362993 is an equidigital number, since it uses as much as digits as its factorization.

66362993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 44.

The square root of 66362993 is about 8146.3484457762. The cubic root of 66362993 is about 404.8635276605.

The spelling of 66362993 in words is "sixty-six million, three hundred sixty-two thousand, nine hundred ninety-three".