65989836 has 48 divisors (see below), whose sum is σ = 186641280. Its totient is φ = 19996560.

The previous prime is 65989817. The next prime is 65989837. The reversal of 65989836 is 63898956.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (65989837) 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 15 ways as a sum of consecutive naturals, for example, 26586 + ... + 28961.

It is an arithmetic number, because the mean of its divisors is an integer number (3888360).

Almost surely, 2^65989836 is an apocalyptic number.

65989836 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

65989836 is an abundant number, since it is smaller than the sum of its proper divisors (120651444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65989836 is a wasteful number, since it uses less digits than its factorization.

65989836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55571 (or 55563 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 65989836 is about 8123.4128295932. The cubic root of 65989836 is about 404.1032559651.

The spelling of 65989836 in words is "sixty-five million, nine hundred eighty-nine thousand, eight hundred thirty-six".