665197363 has 2 divisors, whose sum is σ = 665197364. Its totient is φ = 665197362.

The previous prime is 665197361. The next prime is 665197399. The reversal of 665197363 is 363791566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665197363 - 2¹ = 665197361 is a prime.

Together with 665197361, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (665197361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332598681 + 332598682.

It is an arithmetic number, because the mean of its divisors is an integer number (332598682).

Almost surely, 2^665197363 is an apocalyptic number.

665197363 is a deficient number, since it is larger than the sum of its proper divisors (1).

665197363 is an equidigital number, since it uses as much as digits as its factorization.

665197363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 46.

The square root of 665197363 is about 25791.4203370035. The cubic root of 665197363 is about 872.9382151852.

The spelling of 665197363 in words is "six hundred sixty-five million, one hundred ninety-seven thousand, three hundred sixty-three".