65610851 has 4 divisors (see below), whose sum is σ = 66191592. Its totient is φ = 65030112.

The previous prime is 65610841. The next prime is 65610877. The reversal of 65610851 is 15801656.

It is a happy number.

65610851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65610851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65610841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290201 + ... + 290426.

It is an arithmetic number, because the mean of its divisors is an integer number (16547898).

Almost surely, 2^65610851 is an apocalyptic number.

65610851 is a deficient number, since it is larger than the sum of its proper divisors (580741).

65610851 is a wasteful number, since it uses less digits than its factorization.

65610851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580740.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 65610851 is about 8100.0525306939. The cubic root of 65610851 is about 403.3281709757.

The spelling of 65610851 in words is "sixty-five million, six hundred ten thousand, eight hundred fifty-one".