65771008 has 40 divisors (see below), whose sum is σ = 138350520. Its totient is φ = 31150080.

The previous prime is 65770987. The next prime is 65771009. The reversal of 65771008 is 80017756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65771009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6348 + ... + 13108.

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

Almost surely, 2^65771008 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 65771008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69175260).

65771008 is an abundant number, since it is smaller than the sum of its proper divisors (72579512).

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

65771008 is an equidigital number, since it uses as much as digits as its factorization.

65771008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6798 (or 6782 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 65771008 is about 8109.9326754296. The cubic root of 65771008 is about 403.6560808680.

The spelling of 65771008 in words is "sixty-five million, seven hundred seventy-one thousand, eight".