65986340 has 48 divisors (see below), whose sum is σ = 161616000. Its totient is φ = 22621536.

The previous prime is 65986337. The next prime is 65986391. The reversal of 65986340 is 4368956.

It is an unprimeable number.

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, 2051 + ... + 11669.

It is an arithmetic number, because the mean of its divisors is an integer number (3367000).

Almost surely, 2^65986340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65986340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80808000).

65986340 is an abundant number, since it is smaller than the sum of its proper divisors (95629660).

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

65986340 is a wasteful number, since it uses less digits than its factorization.

65986340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9649 (or 9633 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 65986340 is about 8123.1976462474. The cubic root of 65986340 is about 404.0961196644.

The spelling of 65986340 in words is "sixty-five million, nine hundred eighty-six thousand, three hundred forty".