65744540 has 24 divisors (see below), whose sum is σ = 141003072. Its totient is φ = 25737920.

The previous prime is 65744533. The next prime is 65744543. The reversal of 65744540 is 4544756.

It is a self number, because there is not a number n which added to its sum of digits gives 65744540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65744543) 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, 34031 + ... + 35910.

It is an arithmetic number, because the mean of its divisors is an integer number (5875128).

Almost surely, 2^65744540 is an apocalyptic number.

It is an amenable number.

65744540 is an abundant number, since it is smaller than the sum of its proper divisors (75258532).

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

65744540 is a wasteful number, since it uses less digits than its factorization.

65744540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69997 (or 69995 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 65744540 is about 8108.3006851004. The cubic root of 65744540 is about 403.6019262946.

The spelling of 65744540 in words is "sixty-five million, seven hundred forty-four thousand, five hundred forty".