65645938 has 4 divisors (see below), whose sum is σ = 98468910. Its totient is φ = 32822968.

The previous prime is 65645929. The next prime is 65645977. The reversal of 65645938 is 83954656.

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., 60730849 + 4915089 = 7793^2 + 2217^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16411483 + ... + 16411486.

Almost surely, 2^65645938 is an apocalyptic number.

65645938 is a deficient number, since it is larger than the sum of its proper divisors (32822972).

65645938 is a wasteful number, since it uses less digits than its factorization.

65645938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32822971.

The product of its digits is 777600, while the sum is 46.

The square root of 65645938 is about 8102.2180913624. The cubic root of 65645938 is about 403.4000546831.

The spelling of 65645938 in words is "sixty-five million, six hundred forty-five thousand, nine hundred thirty-eight".