65674816 has 21 divisors (see below), whose sum is σ = 130452241. Its totient is φ = 32804992.

The previous prime is 65674783. The next prime is 65674823. The reversal of 65674816 is 61847656.

It is a happy number.

The square root of 65674816 is 8104.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 129600 + 65545216 = 360^2 + 8096^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 64326 + ... + 65338.

Almost surely, 2^65674816 is an apocalyptic number.

65674816 is the 8104-th square number.

It is an amenable number.

65674816 is a deficient number, since it is larger than the sum of its proper divisors (64777425).

65674816 is an frugal number, since it uses more digits than its factorization.

65674816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038 (or 1015 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The cubic root of 65674816 is about 403.4591986268.

The spelling of 65674816 in words is "sixty-five million, six hundred seventy-four thousand, eight hundred sixteen".