65557340 has 24 divisors (see below), whose sum is σ = 141392832. Its totient is φ = 25513920.

The previous prime is 65557309. The next prime is 65557351. The reversal of 65557340 is 4375556.

It is a self number, because there is not a number n which added to its sum of digits gives 65557340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43556 + ... + 45035.

It is an arithmetic number, because the mean of its divisors is an integer number (5891368).

Almost surely, 2^65557340 is an apocalyptic number.

It is an amenable number.

65557340 is an abundant number, since it is smaller than the sum of its proper divisors (75835492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65557340 is a wasteful number, since it uses less digits than its factorization.

65557340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88637 (or 88635 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 35.

The square root of 65557340 is about 8096.7487302003. The cubic root of 65557340 is about 403.2184921471.

The spelling of 65557340 in words is "sixty-five million, five hundred fifty-seven thousand, three hundred forty".