65645834 has 8 divisors (see below), whose sum is σ = 99817860. Its totient is φ = 32373216.

The previous prime is 65645809. The next prime is 65645843. The reversal of 65645834 is 43854656.

It can be written as a sum of positive squares in 2 ways, for example, as 56325025 + 9320809 = 7505^2 + 3053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65645791 and 65645800.

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, 224669 + ... + 224960.

Almost surely, 2^65645834 is an apocalyptic number.

65645834 is a deficient number, since it is larger than the sum of its proper divisors (34172026).

65645834 is a wasteful number, since it uses less digits than its factorization.

65645834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449704.

The product of its digits is 345600, while the sum is 41.

The square root of 65645834 is about 8102.2116733643. The cubic root of 65645834 is about 403.3998416533.

It can be divided in two parts, 6564 and 5834, that multiplied together give a triangular number (38294376 = T₈₇₅₁).

The spelling of 65645834 in words is "sixty-five million, six hundred forty-five thousand, eight hundred thirty-four".