65557361 has 4 divisors (see below), whose sum is σ = 65733492. Its totient is φ = 65381232.

The previous prime is 65557351. The next prime is 65557379. The reversal of 65557361 is 16375556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55413136 + 10144225 = 7444^2 + 3185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65557361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65557351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87506 + ... + 88251.

It is an arithmetic number, because the mean of its divisors is an integer number (16433373).

Almost surely, 2^65557361 is an apocalyptic number.

It is an amenable number.

65557361 is a deficient number, since it is larger than the sum of its proper divisors (176131).

65557361 is a wasteful number, since it uses less digits than its factorization.

65557361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176130.

The product of its digits is 94500, while the sum is 38.

The square root of 65557361 is about 8096.7500270170. The cubic root of 65557361 is about 403.2185352014.

The spelling of 65557361 in words is "sixty-five million, five hundred fifty-seven thousand, three hundred sixty-one".