65885540 has 192 divisors, whose sum is σ = 185794560. Its totient is φ = 19077120.

The previous prime is 65885539. The next prime is 65885569. The reversal of 65885540 is 4558856.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1401797 + ... + 1401843.

It is an arithmetic number, because the mean of its divisors is an integer number (967680).

Almost surely, 2^65885540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65885540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92897280).

65885540 is an abundant number, since it is smaller than the sum of its proper divisors (119909020).

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

65885540 is a wasteful number, since it uses less digits than its factorization.

65885540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 41.

The square root of 65885540 is about 8116.9908217270. The cubic root of 65885540 is about 403.8902505532.

The spelling of 65885540 in words is "sixty-five million, eight hundred eighty-five thousand, five hundred forty".