65619012 has 12 divisors (see below), whose sum is σ = 153111056. Its totient is φ = 21873000.

The previous prime is 65619011. The next prime is 65619017. The reversal of 65619012 is 21091656.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×65619012² = 8611709471712288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65619011) 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 3 ways as a sum of consecutive naturals, for example, 2734114 + ... + 2734137.

Almost surely, 2^65619012 is an apocalyptic number.

It is an amenable number.

65619012 is an abundant number, since it is smaller than the sum of its proper divisors (87492044).

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

65619012 is a wasteful number, since it uses less digits than its factorization.

65619012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5468258 (or 5468256 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 65619012 is about 8100.5562771948. The cubic root of 65619012 is about 403.3448929289.

The spelling of 65619012 in words is "sixty-five million, six hundred nineteen thousand, twelve".