65366040960 has 640 divisors, whose sum is σ = 258056409600. Its totient is φ = 15634944000.

The previous prime is 65366040877. The next prime is 65366040989. The reversal of 65366040960 is 6904066356.

65366040960 is a `hidden beast` number, since 6 + 5 + 36 + 604 + 0 + 9 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 45048235 + ... + 45049685.

It is an arithmetic number, because the mean of its divisors is an integer number (403213140).

Almost surely, 2^65366040960 is an apocalyptic number.

65366040960 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 65366040960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129028204800).

65366040960 is an abundant number, since it is smaller than the sum of its proper divisors (192690368640).

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

65366040960 is a wasteful number, since it uses less digits than its factorization.

65366040960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 1551 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The spelling of 65366040960 in words is "sixty-five billion, three hundred sixty-six million, forty thousand, nine hundred sixty".