65220928740 has 864 divisors, whose sum is σ = 247621570560. Its totient is φ = 13795246080.

The previous prime is 65220928727. The next prime is 65220928741. The reversal of 65220928740 is 4782902256.

65220928740 is a `hidden beast` number, since 6 + 522 + 0 + 9 + 2 + 87 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (65220928741) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 513550557 + ... + 513550683.

It is an arithmetic number, because the mean of its divisors is an integer number (286599040).

Almost surely, 2^65220928740 is an apocalyptic number.

65220928740 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 65220928740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123810785280).

65220928740 is an abundant number, since it is smaller than the sum of its proper divisors (182400641820).

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

65220928740 is a wasteful number, since it uses less digits than its factorization.

65220928740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 65220928740 in words is "sixty-five billion, two hundred twenty million, nine hundred twenty-eight thousand, seven hundred forty".