65856872 has 8 divisors (see below), whose sum is σ = 123481650. Its totient is φ = 32928432.

The previous prime is 65856871. The next prime is 65856887. The reversal of 65856872 is 27865856.

It can be written as a sum of positive squares in only one way, i.e., 57365476 + 8491396 = 7574^2 + 2914^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (65856871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4116047 + ... + 4116062.

Almost surely, 2^65856872 is an apocalyptic number.

It is an amenable number.

65856872 is a deficient number, since it is larger than the sum of its proper divisors (57624778).

65856872 is a wasteful number, since it uses less digits than its factorization.

65856872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8232115 (or 8232111 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The square root of 65856872 is about 8115.2247042211. The cubic root of 65856872 is about 403.8316620501.

The spelling of 65856872 in words is "sixty-five million, eight hundred fifty-six thousand, eight hundred seventy-two".