65540407 has 2 divisors, whose sum is σ = 65540408. Its totient is φ = 65540406.

The previous prime is 65540393. The next prime is 65540411. The reversal of 65540407 is 70404556.

It is a happy number.

65540407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65540407 - 2²³ = 57151799 is a prime.

It is equal to p_3870607 and since 65540407 and 3870607 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65540207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32770203 + 32770204.

It is an arithmetic number, because the mean of its divisors is an integer number (32770204).

Almost surely, 2^65540407 is an apocalyptic number.

65540407 is a deficient number, since it is larger than the sum of its proper divisors (1).

65540407 is an equidigital number, since it uses as much as digits as its factorization.

65540407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 65540407 is about 8095.7029960344. The cubic root of 65540407 is about 403.1837729905.

The spelling of 65540407 in words is "sixty-five million, five hundred forty thousand, four hundred seven".