65573551 has 2 divisors, whose sum is σ = 65573552. Its totient is φ = 65573550.

The previous prime is 65573549. The next prime is 65573609. The reversal of 65573551 is 15537556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65573551 - 2¹ = 65573549 is a prime.

Together with 65573549, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 65573551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65573531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32786775 + 32786776.

It is an arithmetic number, because the mean of its divisors is an integer number (32786776).

Almost surely, 2^65573551 is an apocalyptic number.

65573551 is a deficient number, since it is larger than the sum of its proper divisors (1).

65573551 is an equidigital number, since it uses as much as digits as its factorization.

65573551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78750, while the sum is 37.

The square root of 65573551 is about 8097.7497491587. The cubic root of 65573551 is about 403.2517253251.

The spelling of 65573551 in words is "sixty-five million, five hundred seventy-three thousand, five hundred fifty-one".