65980340 has 12 divisors (see below), whose sum is σ = 138558756. Its totient is φ = 26392128.

The previous prime is 65980319. The next prime is 65980351. The reversal of 65980340 is 4308956.

It can be written as a sum of positive squares in 2 ways, for example, as 24661156 + 41319184 = 4966^2 + 6428^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65980340.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1649489 + ... + 1649528.

It is an arithmetic number, because the mean of its divisors is an integer number (11546563).

Almost surely, 2^65980340 is an apocalyptic number.

It is an amenable number.

65980340 is an abundant number, since it is smaller than the sum of its proper divisors (72578416).

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

65980340 is a wasteful number, since it uses less digits than its factorization.

65980340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299026 (or 3299024 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 65980340 is about 8122.8283251587. The cubic root of 65980340 is about 404.0838714213.

The spelling of 65980340 in words is "sixty-five million, nine hundred eighty thousand, three hundred forty".