65833980 has 48 divisors (see below), whose sum is σ = 185703840. Its totient is φ = 17425408.

The previous prime is 65833949. The next prime is 65833991. The reversal of 65833980 is 8933856.

It is a super-2 number, since 2×65833980² = 8668225845280800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 4216 + ... + 12224.

It is an arithmetic number, because the mean of its divisors is an integer number (3868830).

Almost surely, 2^65833980 is an apocalyptic number.

65833980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65833980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92851920).

65833980 is an abundant number, since it is smaller than the sum of its proper divisors (119869860).

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

65833980 is a wasteful number, since it uses less digits than its factorization.

65833980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8158 (or 8156 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 65833980 is about 8113.8141462570. The cubic root of 65833980 is about 403.7848656897.

The spelling of 65833980 in words is "sixty-five million, eight hundred thirty-three thousand, nine hundred eighty".