65105986 has 24 divisors (see below), whose sum is σ = 111057660. Its totient is φ = 28570080.

The previous prime is 65105981. The next prime is 65105987. The reversal of 65105986 is 68950156.

It can be written as a sum of positive squares in 2 ways, for example, as 62900761 + 2205225 = 7931^2 + 1485^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (65105981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2380 + ... + 11656.

Almost surely, 2^65105986 is an apocalyptic number.

65105986 is a deficient number, since it is larger than the sum of its proper divisors (45951674).

65105986 is a wasteful number, since it uses less digits than its factorization.

65105986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9330 (or 9319 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 65105986 is about 8068.8280437744. The cubic root of 65105986 is about 402.2909908511.

The spelling of 65105986 in words is "sixty-five million, one hundred five thousand, nine hundred eighty-six".