665652049 has 2 divisors, whose sum is σ = 665652050. Its totient is φ = 665652048.

The previous prime is 665652041. The next prime is 665652073. The reversal of 665652049 is 940256566.

665652049 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., 636653824 + 28998225 = 25232^2 + 5385^2 .

It is a cyclic number.

It is not a de Polignac number, because 665652049 - 2³ = 665652041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665651996 and 665652014.

It is not a weakly prime, because it can be changed into another prime (665652041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332826024 + 332826025.

It is an arithmetic number, because the mean of its divisors is an integer number (332826025).

Almost surely, 2^665652049 is an apocalyptic number.

It is an amenable number.

665652049 is a deficient number, since it is larger than the sum of its proper divisors (1).

665652049 is an equidigital number, since it uses as much as digits as its factorization.

665652049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 665652049 is about 25800.2335066952. The cubic root of 665652049 is about 873.1370646330.

The spelling of 665652049 in words is "six hundred sixty-five million, six hundred fifty-two thousand, forty-nine".