665484097 has 2 divisors, whose sum is σ = 665484098. Its totient is φ = 665484096.

The previous prime is 665484089. The next prime is 665484121. The reversal of 665484097 is 790484566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 453519616 + 211964481 = 21296^2 + 14559^2 .

It is a cyclic number.

It is not a de Polignac number, because 665484097 - 2³ = 665484089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665484097.

It is not a weakly prime, because it can be changed into another prime (665484067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332742048 + 332742049.

It is an arithmetic number, because the mean of its divisors is an integer number (332742049).

Almost surely, 2^665484097 is an apocalyptic number.

It is an amenable number.

665484097 is a deficient number, since it is larger than the sum of its proper divisors (1).

665484097 is an equidigital number, since it uses as much as digits as its factorization.

665484097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 665484097 is about 25796.9784470972. The cubic root of 665484097 is about 873.0636241362.

The spelling of 665484097 in words is "six hundred sixty-five million, four hundred eighty-four thousand, ninety-seven".