65740447 has 2 divisors, whose sum is σ = 65740448. Its totient is φ = 65740446.

The previous prime is 65740393. The next prime is 65740459. The reversal of 65740447 is 74404756.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65740447 - 2¹¹ = 65738399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65740487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32870223 + 32870224.

It is an arithmetic number, because the mean of its divisors is an integer number (32870224).

Almost surely, 2^65740447 is an apocalyptic number.

65740447 is a deficient number, since it is larger than the sum of its proper divisors (1).

65740447 is an equidigital number, since it uses as much as digits as its factorization.

65740447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 37.

The square root of 65740447 is about 8108.0482855000. The cubic root of 65740447 is about 403.5935505574.

The spelling of 65740447 in words is "sixty-five million, seven hundred forty thousand, four hundred forty-seven".