65440834 has 4 divisors (see below), whose sum is σ = 98161254. Its totient is φ = 32720416.

The previous prime is 65440831. The next prime is 65440841. The reversal of 65440834 is 43804456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34047225 + 31393609 = 5835^2 + 5603^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65440834.

It is not an unprimeable number, because it can be changed into a prime (65440831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16360207 + ... + 16360210.

Almost surely, 2^65440834 is an apocalyptic number.

65440834 is a deficient number, since it is larger than the sum of its proper divisors (32720420).

65440834 is a wasteful number, since it uses less digits than its factorization.

65440834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32720419.

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 65440834 is about 8089.5509146058. The cubic root of 65440834 is about 402.9794890090.

The spelling of 65440834 in words is "sixty-five million, four hundred forty thousand, eight hundred thirty-four".