66097693 has 2 divisors, whose sum is σ = 66097694. Its totient is φ = 66097692.

The previous prime is 66097687. The next prime is 66097747. The reversal of 66097693 is 39679066.

66097693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42797764 + 23299929 = 6542^2 + 4827^2 .

It is a cyclic number.

It is not a de Polignac number, because 66097693 - 2¹³ = 66089501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66097613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33048846 + 33048847.

It is an arithmetic number, because the mean of its divisors is an integer number (33048847).

Almost surely, 2^66097693 is an apocalyptic number.

It is an amenable number.

66097693 is a deficient number, since it is larger than the sum of its proper divisors (1).

66097693 is an equidigital number, since it uses as much as digits as its factorization.

66097693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 46.

The square root of 66097693 is about 8130.0487698414. The cubic root of 66097693 is about 404.3232981365.

The spelling of 66097693 in words is "sixty-six million, ninety-seven thousand, six hundred ninety-three".