65440327699 has 2 divisors, whose sum is σ = 65440327700. Its totient is φ = 65440327698.

The previous prime is 65440327691. The next prime is 65440327721. The reversal of 65440327699 is 99672304456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65440327699 - 2³ = 65440327691 is a prime.

It is not a weakly prime, because it can be changed into another prime (65440327691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32720163849 + 32720163850.

It is an arithmetic number, because the mean of its divisors is an integer number (32720163850).

Almost surely, 2^65440327699 is an apocalyptic number.

65440327699 is a deficient number, since it is larger than the sum of its proper divisors (1).

65440327699 is an equidigital number, since it uses as much as digits as its factorization.

65440327699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 65440327699 in words is "sixty-five billion, four hundred forty million, three hundred twenty-seven thousand, six hundred ninety-nine".