65550992 has 40 divisors (see below), whose sum is σ = 138350520. Its totient is φ = 29905920.

The previous prime is 65550977. The next prime is 65551033. The reversal of 65550992 is 29905556.

It can be written as a sum of positive squares in 4 ways, for example, as 5776 + 65545216 = 76^2 + 8096^2 .

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, 16742 + ... + 20282.

It is an arithmetic number, because the mean of its divisors is an integer number (3458763).

Almost surely, 2^65550992 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 65550992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69175260).

65550992 is an abundant number, since it is smaller than the sum of its proper divisors (72799528).

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

65550992 is a wasteful number, since it uses less digits than its factorization.

65550992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651 (or 3645 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 41.

The square root of 65550992 is about 8096.3567115092. The cubic root of 65550992 is about 403.2054770084.

The spelling of 65550992 in words is "sixty-five million, five hundred fifty thousand, nine hundred ninety-two".