65866380 has 48 divisors (see below), whose sum is σ = 184902144. Its totient is φ = 17519040.

The previous prime is 65866363. The next prime is 65866387. The reversal of 65866380 is 8366856.

65866380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (65866387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26595 + ... + 28965.

It is an arithmetic number, because the mean of its divisors is an integer number (3852128).

Almost surely, 2^65866380 is an apocalyptic number.

65866380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65866380 is an abundant number, since it is smaller than the sum of its proper divisors (119035764).

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

65866380 is a wasteful number, since it uses less digits than its factorization.

65866380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846 (or 2844 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 65866380 is about 8115.8104955697. The cubic root of 65866380 is about 403.8510953381.

The spelling of 65866380 in words is "sixty-five million, eight hundred sixty-six thousand, three hundred eighty".