65616727 has 12 divisors (see below), whose sum is σ = 72777600. Its totient is φ = 59111360.

The previous prime is 65616697. The next prime is 65616731. The reversal of 65616727 is 72761656.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-65616727 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65616727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65616767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11274 + ... + 16072.

It is an arithmetic number, because the mean of its divisors is an integer number (6064800).

Almost surely, 2^65616727 is an apocalyptic number.

65616727 is a deficient number, since it is larger than the sum of its proper divisors (7160873).

65616727 is a wasteful number, since it uses less digits than its factorization.

65616727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4934 (or 4923 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 65616727 is about 8100.4152362703. The cubic root of 65616727 is about 403.3402110857.

Subtracting 65616727 from its reverse (72761656), we obtain a square (7144929 = 2673²).

The spelling of 65616727 in words is "sixty-five million, six hundred sixteen thousand, seven hundred twenty-seven".