65371980 has 96 divisors (see below), whose sum is σ = 193019904. Its totient is φ = 16498944.

The previous prime is 65371939. The next prime is 65371981. The reversal of 65371980 is 8917356.

It is a zygodrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (65371981) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 175074 + ... + 175446.

It is an arithmetic number, because the mean of its divisors is an integer number (2010624).

Almost surely, 2^65371980 is an apocalyptic number.

65371980 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 65371980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96509952).

65371980 is an abundant number, since it is smaller than the sum of its proper divisors (127647924).

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

65371980 is a wasteful number, since it uses less digits than its factorization.

65371980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 65371980 is about 8085.2940577322. The cubic root of 65371980 is about 402.8381069134.

The spelling of 65371980 in words is "sixty-five million, three hundred seventy-one thousand, nine hundred eighty".