65687442 has 16 divisors (see below), whose sum is σ = 131922912. Its totient is φ = 21804480.

The previous prime is 65687381. The next prime is 65687443. The reversal of 65687442 is 24478656.

It is a junction number, because it is equal to n+sod(n) for n = 65687394 and 65687403.

It is not an unprimeable number, because it can be changed into a prime (65687443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21268 + ... + 24159.

It is an arithmetic number, because the mean of its divisors is an integer number (8245182).

Almost surely, 2^65687442 is an apocalyptic number.

65687442 is an abundant number, since it is smaller than the sum of its proper divisors (66235470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65687442 is a wasteful number, since it uses less digits than its factorization.

65687442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45673.

The product of its digits is 322560, while the sum is 42.

The square root of 65687442 is about 8104.7789605886. The cubic root of 65687442 is about 403.4850520145.

The spelling of 65687442 in words is "sixty-five million, six hundred eighty-seven thousand, four hundred forty-two".