65329920 has 216 divisors, whose sum is σ = 232451856. Its totient is φ = 16932864.

The previous prime is 65329903. The next prime is 65329937. The reversal of 65329920 is 2992356.

It is an interprime number because it is at equal distance from previous prime (65329903) and next prime (65329937).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 610507 + ... + 610613.

It is an arithmetic number, because the mean of its divisors is an integer number (1076166).

Almost surely, 2^65329920 is an apocalyptic number.

65329920 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 65329920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116225928).

65329920 is an abundant number, since it is smaller than the sum of its proper divisors (167121936).

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

65329920 is a wasteful number, since it uses less digits than its factorization.

65329920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 65329920 is about 8082.6926206556. The cubic root of 65329920 is about 402.7516937140.

The spelling of 65329920 in words is "sixty-five million, three hundred twenty-nine thousand, nine hundred twenty".