65527840 has 96 divisors (see below), whose sum is σ = 181367424. Its totient is φ = 21903360.

The previous prime is 65527837. The next prime is 65527841. The reversal of 65527840 is 4872556.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 65527840.

It is not an unprimeable number, because it can be changed into a prime (65527841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45207 + ... + 46633.

It is an arithmetic number, because the mean of its divisors is an integer number (1889244).

Almost surely, 2^65527840 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 65527840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90683712).

65527840 is an abundant number, since it is smaller than the sum of its proper divisors (115839584).

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

65527840 is a wasteful number, since it uses less digits than its factorization.

65527840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490 (or 1482 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 65527840 is about 8094.9268063399. The cubic root of 65527840 is about 403.1580019454.

The spelling of 65527840 in words is "sixty-five million, five hundred twenty-seven thousand, eight hundred forty".