65651 has 2 divisors, whose sum is σ = 65652. Its totient is φ = 65650.

The previous prime is 65647. The next prime is 65657. The reversal of 65651 is 15656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65651 - 2² = 65647 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 65651.

It is not a weakly prime, because it can be changed into another prime (65657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32825 + 32826.

It is an arithmetic number, because the mean of its divisors is an integer number (32826).

2⁶⁵⁶⁵¹ is an apocalyptic number.

65651 is a deficient number, since it is larger than the sum of its proper divisors (1).

65651 is an equidigital number, since it uses as much as digits as its factorization.

65651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 23.

The square root of 65651 is about 256.2245109274. The cubic root of 65651 is about 40.3410423228.

It can be divided in two parts, 656 and 51, that added together give a palindrome (707).

The spelling of 65651 in words is "sixty-five thousand, six hundred fifty-one".