65613644 has 12 divisors (see below), whose sum is σ = 114886968. Its totient is φ = 32788800.

The previous prime is 65613643. The next prime is 65613677. The reversal of 65613644 is 44631656.

It is not an unprimeable number, because it can be changed into a prime (65613643) 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, 6884 + ... + 13364.

It is an arithmetic number, because the mean of its divisors is an integer number (9573914).

Almost surely, 2^65613644 is an apocalyptic number.

It is an amenable number.

65613644 is a deficient number, since it is larger than the sum of its proper divisors (49273324).

65613644 is a wasteful number, since it uses less digits than its factorization.

65613644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9016 (or 9014 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 65613644 is about 8100.2249351484. The cubic root of 65613644 is about 403.3338940107. Note that the first 3 decimals are identical.

The spelling of 65613644 in words is "sixty-five million, six hundred thirteen thousand, six hundred forty-four".