65644950 has 96 divisors (see below), whose sum is σ = 188202240. Its totient is φ = 14832000.

The previous prime is 65644927. The next prime is 65644979. The reversal of 65644950 is 5944656.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65644899 and 65644908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 105741 + ... + 106359.

It is an arithmetic number, because the mean of its divisors is an integer number (1960440).

Almost surely, 2^65644950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65644950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94101120).

65644950 is an abundant number, since it is smaller than the sum of its proper divisors (122557290).

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

65644950 is a wasteful number, since it uses less digits than its factorization.

65644950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 65644950 is about 8102.1571201748. The cubic root of 65644950 is about 403.3980308907.

The spelling of 65644950 in words is "sixty-five million, six hundred forty-four thousand, nine hundred fifty".