65944147 has 4 divisors (see below), whose sum is σ = 66928456. Its totient is φ = 64959840.

The previous prime is 65944133. The next prime is 65944171. The reversal of 65944147 is 74144956.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65944147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65944127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492054 + ... + 492187.

It is an arithmetic number, because the mean of its divisors is an integer number (16732114).

Almost surely, 2^65944147 is an apocalyptic number.

65944147 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

65944147 is a deficient number, since it is larger than the sum of its proper divisors (984309).

65944147 is an equidigital number, since it uses as much as digits as its factorization.

65944147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984308.

The product of its digits is 120960, while the sum is 40.

The square root of 65944147 is about 8120.6001625496. The cubic root of 65944147 is about 404.0099722239.

The spelling of 65944147 in words is "sixty-five million, nine hundred forty-four thousand, one hundred forty-seven".