65625866 has 8 divisors (see below), whose sum is σ = 98593824. Its totient is φ = 32761260.

The previous prime is 65625863. The next prime is 65625883. The reversal of 65625866 is 66852656.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (65625863) 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, 24230 + ... + 26801.

It is an arithmetic number, because the mean of its divisors is an integer number (12324228).

Almost surely, 2^65625866 is an apocalyptic number.

65625866 is a deficient number, since it is larger than the sum of its proper divisors (32967958).

65625866 is a wasteful number, since it uses less digits than its factorization.

65625866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51676.

The product of its digits is 518400, while the sum is 44.

The square root of 65625866 is about 8100.9793235139. The cubic root of 65625866 is about 403.3589357576.

The spelling of 65625866 in words is "sixty-five million, six hundred twenty-five thousand, eight hundred sixty-six".