65686642 has 8 divisors (see below), whose sum is σ = 112605696. Its totient is φ = 28151412.

The previous prime is 65686639. The next prime is 65686651. The reversal of 65686642 is 24668656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2345938 + ... + 2345965.

It is an arithmetic number, because the mean of its divisors is an integer number (14075712).

Almost surely, 2^65686642 is an apocalyptic number.

65686642 is a deficient number, since it is larger than the sum of its proper divisors (46919054).

65686642 is a wasteful number, since it uses less digits than its factorization.

65686642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4691912.

The product of its digits is 414720, while the sum is 43.

The square root of 65686642 is about 8104.7296068407. The cubic root of 65686642 is about 403.4834140081.

The spelling of 65686642 in words is "sixty-five million, six hundred eighty-six thousand, six hundred forty-two".