66316297 has 4 divisors (see below), whose sum is σ = 66972996. Its totient is φ = 65659600.

The previous prime is 66316267. The next prime is 66316309. The reversal of 66316297 is 79261366.

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 64705936 + 1610361 = 8044^2 + 1269^2 .

It is a cyclic number.

It is not a de Polignac number, because 66316297 - 2⁷ = 66316169 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 (66316267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328198 + ... + 328399.

It is an arithmetic number, because the mean of its divisors is an integer number (16743249).

Almost surely, 2^66316297 is an apocalyptic number.

It is an amenable number.

66316297 is a deficient number, since it is larger than the sum of its proper divisors (656699).

66316297 is a wasteful number, since it uses less digits than its factorization.

66316297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656698.

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

The square root of 66316297 is about 8143.4818720250. The cubic root of 66316297 is about 404.7685452894.

The spelling of 66316297 in words is "sixty-six million, three hundred sixteen thousand, two hundred ninety-seven".