65635664 has 10 divisors (see below), whose sum is σ = 127169130. Its totient is φ = 32817824.

The previous prime is 65635663. The next prime is 65635667. The reversal of 65635664 is 46653656.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 63361600 + 2274064 = 7960^2 + 1508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65635663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2051099 + ... + 2051130.

It is an arithmetic number, because the mean of its divisors is an integer number (12716913).

Almost surely, 2^65635664 is an apocalyptic number.

It is an amenable number.

65635664 is a deficient number, since it is larger than the sum of its proper divisors (61533466).

65635664 is a wasteful number, since it uses less digits than its factorization.

65635664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4102237 (or 4102231 counting only the distinct ones).

The product of its digits is 388800, while the sum is 41.

The square root of 65635664 is about 8101.5840426425. The cubic root of 65635664 is about 403.3790087077.

The spelling of 65635664 in words is "sixty-five million, six hundred thirty-five thousand, six hundred sixty-four".