65077320 has 128 divisors (see below), whose sum is σ = 243440640. Its totient is φ = 13520640.

The previous prime is 65077307. The next prime is 65077349. The reversal of 65077320 is 2377056.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5719 + ... + 12761.

It is an arithmetic number, because the mean of its divisors is an integer number (1901880).

Almost surely, 2^65077320 is an apocalyptic number.

65077320 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 65077320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121720320).

65077320 is an abundant number, since it is smaller than the sum of its proper divisors (178363320).

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

65077320 is a wasteful number, since it uses less digits than its factorization.

65077320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7075 (or 7071 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 30.

The square root of 65077320 is about 8067.0515059717. The cubic root of 65077320 is about 402.2319396169.

The spelling of 65077320 in words is "sixty-five million, seventy-seven thousand, three hundred twenty".