65644942 has 16 divisors (see below), whose sum is σ = 107550000. Its totient is φ = 29802240.

The previous prime is 65644927. The next prime is 65644979. The reversal of 65644942 is 24944656.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 65644895 and 65644904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26284 + ... + 28672.

It is an arithmetic number, because the mean of its divisors is an integer number (6721875).

Almost surely, 2^65644942 is an apocalyptic number.

65644942 is a deficient number, since it is larger than the sum of its proper divisors (41905058).

65644942 is a wasteful number, since it uses less digits than its factorization.

65644942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3651.

The product of its digits is 207360, while the sum is 40.

The square root of 65644942 is about 8102.1566264791. The cubic root of 65644942 is about 403.3980145036.

The spelling of 65644942 in words is "sixty-five million, six hundred forty-four thousand, nine hundred forty-two".