65642427 has 8 divisors (see below), whose sum is σ = 97248080. Its totient is φ = 43761600.

The previous prime is 65642419. The next prime is 65642441. The reversal of 65642427 is 72424656.

65642427 is a `hidden beast` number, since 6 + 5 + 642 + 4 + 2 + 7 = 666.

It is not a de Polignac number, because 65642427 - 2³ = 65642419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65642391 and 65642400.

It is not an unprimeable number, because it can be changed into a prime (65642417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215574 + ... + 1215627.

It is an arithmetic number, because the mean of its divisors is an integer number (12156010).

Almost surely, 2^65642427 is an apocalyptic number.

65642427 is a deficient number, since it is larger than the sum of its proper divisors (31605653).

65642427 is a wasteful number, since it uses less digits than its factorization.

65642427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431210 (or 2431204 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 65642427 is about 8102.0014194025. The cubic root of 65642427 is about 403.3928627538.

The spelling of 65642427 in words is "sixty-five million, six hundred forty-two thousand, four hundred twenty-seven".