65814880 has 48 divisors (see below), whose sum is σ = 156008160. Its totient is φ = 26237952.

The previous prime is 65814863. The next prime is 65814887. The reversal of 65814880 is 8841856.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65814887) 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 7 ways as a sum of consecutive naturals, for example, 69772 + ... + 70708.

It is an arithmetic number, because the mean of its divisors is an integer number (3250170).

Almost surely, 2^65814880 is an apocalyptic number.

It is an amenable number.

65814880 is an abundant number, since it is smaller than the sum of its proper divisors (90193280).

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

65814880 is a wasteful number, since it uses less digits than its factorization.

65814880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391 (or 1383 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 65814880 is about 8112.6370558530. The cubic root of 65814880 is about 403.7458127220.

The spelling of 65814880 in words is "sixty-five million, eight hundred fourteen thousand, eight hundred eighty".