65669888 has 36 divisors (see below), whose sum is σ = 132966288. Its totient is φ = 32363520.

The previous prime is 65669869. The next prime is 65669893. The reversal of 65669888 is 88896656.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16370 + ... + 19982.

It is an arithmetic number, because the mean of its divisors is an integer number (3693508).

Almost surely, 2^65669888 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 65669888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66483144).

65669888 is an abundant number, since it is smaller than the sum of its proper divisors (67296400).

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

65669888 is an equidigital number, since it uses as much as digits as its factorization.

65669888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700 (or 3686 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 56.

The square root of 65669888 is about 8103.6959469121. The cubic root of 65669888 is about 403.4491070027.

The spelling of 65669888 in words is "sixty-five million, six hundred sixty-nine thousand, eight hundred eighty-eight".