65889644 has 12 divisors (see below), whose sum is σ = 121375800. Its totient is φ = 31210848.

The previous prime is 65889643. The next prime is 65889661. The reversal of 65889644 is 44698856.

It is a happy number.

It is a super-3 number, since 3×65889644³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65889592 and 65889601.

It is not an unprimeable number, because it can be changed into a prime (65889643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433409 + ... + 433560.

It is an arithmetic number, because the mean of its divisors is an integer number (10114650).

Almost surely, 2^65889644 is an apocalyptic number.

It is an amenable number.

65889644 is a deficient number, since it is larger than the sum of its proper divisors (55486156).

65889644 is a wasteful number, since it uses less digits than its factorization.

65889644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866992 (or 866990 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The square root of 65889644 is about 8117.2436208358. The cubic root of 65889644 is about 403.8986364659.

The spelling of 65889644 in words is "sixty-five million, eight hundred eighty-nine thousand, six hundred forty-four".