65542447 has 2 divisors, whose sum is σ = 65542448. Its totient is φ = 65542446.

The previous prime is 65542439. The next prime is 65542471. The reversal of 65542447 is 74424556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65542447 - 2³ = 65542439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65542417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32771223 + 32771224.

It is an arithmetic number, because the mean of its divisors is an integer number (32771224).

Almost surely, 2^65542447 is an apocalyptic number.

65542447 is a deficient number, since it is larger than the sum of its proper divisors (1).

65542447 is an equidigital number, since it uses as much as digits as its factorization.

65542447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134400, while the sum is 37.

The square root of 65542447 is about 8095.8289878184. The cubic root of 65542447 is about 403.1879560911.

The spelling of 65542447 in words is "sixty-five million, five hundred forty-two thousand, four hundred forty-seven".