65566163740 has 192 divisors, whose sum is σ = 179347488768. Its totient is φ = 19537516800.

The previous prime is 65566163731. The next prime is 65566163759. The reversal of 65566163740 is 4736166556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3954147 + ... + 3970693.

It is an arithmetic number, because the mean of its divisors is an integer number (934101504).

Almost surely, 2^65566163740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65566163740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89673744384).

65566163740 is an abundant number, since it is smaller than the sum of its proper divisors (113781325028).

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

65566163740 is a wasteful number, since it uses less digits than its factorization.

65566163740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16688 (or 16686 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 65566163740 in words is "sixty-five billion, five hundred sixty-six million, one hundred sixty-three thousand, seven hundred forty".