65501766 has 48 divisors (see below), whose sum is σ = 159024528. Its totient is φ = 19310400.

The previous prime is 65501753. The next prime is 65501783. The reversal of 65501766 is 66710556.

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 65501766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2856 + ... + 11796.

It is an arithmetic number, because the mean of its divisors is an integer number (3313011).

Almost surely, 2^65501766 is an apocalyptic number.

65501766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 65501766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79512264).

65501766 is an abundant number, since it is smaller than the sum of its proper divisors (93522762).

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

65501766 is a wasteful number, since it uses less digits than its factorization.

65501766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8997 (or 8994 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 65501766 is about 8093.3161312283. The cubic root of 65501766 is about 403.1045216928.

The spelling of 65501766 in words is "sixty-five million, five hundred one thousand, seven hundred sixty-six".