65557489 has 8 divisors (see below), whose sum is σ = 66627360. Its totient is φ = 64495200.

The previous prime is 65557477. The next prime is 65557511. The reversal of 65557489 is 98475556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65557489 - 2⁹ = 65556977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65557589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17034 + ... + 20524.

It is an arithmetic number, because the mean of its divisors is an integer number (8328420).

Almost surely, 2^65557489 is an apocalyptic number.

It is an amenable number.

65557489 is a deficient number, since it is larger than the sum of its proper divisors (1069871).

65557489 is a wasteful number, since it uses less digits than its factorization.

65557489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791.

The product of its digits is 1512000, while the sum is 49.

The square root of 65557489 is about 8096.7579314192. The cubic root of 65557489 is about 403.2187976278.

The spelling of 65557489 in words is "sixty-five million, five hundred fifty-seven thousand, four hundred eighty-nine".