65861966 has 8 divisors (see below), whose sum is σ = 98890104. Its totient is φ = 32898600.

The previous prime is 65861941. The next prime is 65861969. The reversal of 65861966 is 66916856.

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

It is a self number, because there is not a number n which added to its sum of digits gives 65861966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65861969) 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 3 ways as a sum of consecutive naturals, for example, 13565 + ... + 17768.

It is an arithmetic number, because the mean of its divisors is an integer number (12361263).

Almost surely, 2^65861966 is an apocalyptic number.

65861966 is a deficient number, since it is larger than the sum of its proper divisors (33028138).

65861966 is a wasteful number, since it uses less digits than its factorization.

65861966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32386.

The product of its digits is 466560, while the sum is 47.

The square root of 65861966 is about 8115.5385526778. The cubic root of 65861966 is about 403.8420738487.

The spelling of 65861966 in words is "sixty-five million, eight hundred sixty-one thousand, nine hundred sixty-six".