665744153 has 2 divisors, whose sum is σ = 665744154. Its totient is φ = 665744152.

The previous prime is 665744147. The next prime is 665744161. The reversal of 665744153 is 351447566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 659051584 + 6692569 = 25672^2 + 2587^2 .

It is a cyclic number.

It is not a de Polignac number, because 665744153 - 2¹⁶ = 665678617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 665744153.

It is not a weakly prime, because it can be changed into another prime (665747153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332872076 + 332872077.

It is an arithmetic number, because the mean of its divisors is an integer number (332872077).

Almost surely, 2^665744153 is an apocalyptic number.

It is an amenable number.

665744153 is a deficient number, since it is larger than the sum of its proper divisors (1).

665744153 is an equidigital number, since it uses as much as digits as its factorization.

665744153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 41.

The square root of 665744153 is about 25802.0183900407. The cubic root of 665744153 is about 873.1773337733.

The spelling of 665744153 in words is "six hundred sixty-five million, seven hundred forty-four thousand, one hundred fifty-three".