65671538 has 4 divisors (see below), whose sum is σ = 98507310. Its totient is φ = 32835768.

The previous prime is 65671537. The next prime is 65671553. The reversal of 65671538 is 83517656.

65671538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 44262409 + 21409129 = 6653^2 + 4627^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65671495 and 65671504.

It is not an unprimeable number, because it can be changed into a prime (65671537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16417883 + ... + 16417886.

Almost surely, 2^65671538 is an apocalyptic number.

65671538 is a deficient number, since it is larger than the sum of its proper divisors (32835772).

65671538 is a wasteful number, since it uses less digits than its factorization.

65671538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32835771.

The product of its digits is 151200, while the sum is 41.

The square root of 65671538 is about 8103.7977516717. The cubic root of 65671538 is about 403.4524859509.

The spelling of 65671538 in words is "sixty-five million, six hundred seventy-one thousand, five hundred thirty-eight".