66163297 has 4 divisors (see below), whose sum is σ = 68444820. Its totient is φ = 63881776.

The previous prime is 66163271. The next prime is 66163309. The reversal of 66163297 is 79236166.

66163297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11861136 + 54302161 = 3444^2 + 7369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66163297 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66163247) 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 in 3 ways as a sum of consecutive naturals, for example, 1140718 + ... + 1140775.

It is an arithmetic number, because the mean of its divisors is an integer number (17111205).

Almost surely, 2^66163297 is an apocalyptic number.

It is an amenable number.

66163297 is a deficient number, since it is larger than the sum of its proper divisors (2281523).

66163297 is a wasteful number, since it uses less digits than its factorization.

66163297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281522.

The product of its digits is 81648, while the sum is 40.

The square root of 66163297 is about 8134.0824313502. The cubic root of 66163297 is about 404.4570216881.

The spelling of 66163297 in words is "sixty-six million, one hundred sixty-three thousand, two hundred ninety-seven".