65981367 has 12 divisors (see below), whose sum is σ = 95379544. Its totient is φ = 43953840.

The previous prime is 65981347. The next prime is 65981371. The reversal of 65981367 is 76318956.

It is a happy number.

It is not a de Polignac number, because 65981367 - 2⁶ = 65981303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65981317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16692 + ... + 20262.

Almost surely, 2^65981367 is an apocalyptic number.

65981367 is a deficient number, since it is larger than the sum of its proper divisors (29398177).

65981367 is a wasteful number, since it uses less digits than its factorization.

65981367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5630 (or 5627 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 65981367 is about 8122.8915418095. The cubic root of 65981367 is about 404.0859679649.

The spelling of 65981367 in words is "sixty-five million, nine hundred eighty-one thousand, three hundred sixty-seven".