65433816 has 144 divisors (see below), whose sum is σ = 218476440. Its totient is φ = 17579520.

The previous prime is 65433757. The next prime is 65433821. The reversal of 65433816 is 61833456.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 59431 + ... + 60521.

Almost surely, 2^65433816 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 65433816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109238220).

65433816 is an abundant number, since it is smaller than the sum of its proper divisors (153042624).

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

65433816 is a wasteful number, since it uses less digits than its factorization.

65433816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1120 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 65433816 is about 8089.1171335319. The cubic root of 65433816 is about 402.9650830640.

The spelling of 65433816 in words is "sixty-five million, four hundred thirty-three thousand, eight hundred sixteen".