65865947 has 8 divisors (see below), whose sum is σ = 76812000. Its totient is φ = 56456232.

The previous prime is 65865937. The next prime is 65865953. The reversal of 65865947 is 74956856.

It is not a de Polignac number, because 65865947 - 2⁸ = 65865691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65865895 and 65865904.

It is not an unprimeable number, because it can be changed into a prime (65865937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95672 + ... + 96357.

It is an arithmetic number, because the mean of its divisors is an integer number (9601500).

Almost surely, 2^65865947 is an apocalyptic number.

65865947 is a deficient number, since it is larger than the sum of its proper divisors (10946053).

65865947 is an equidigital number, since it uses as much as digits as its factorization.

65865947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192050 (or 192036 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 50.

The square root of 65865947 is about 8115.7838192007. The cubic root of 65865947 is about 403.8502103752.

Subtracting 65865947 from its reverse (74956856), we obtain a palindrome (9090909).

The spelling of 65865947 in words is "sixty-five million, eight hundred sixty-five thousand, nine hundred forty-seven".