240308856666 has 96 divisors (see below), whose sum is σ = 577877908608. Its totient is φ = 71841530880.

The previous prime is 240308856661. The next prime is 240308856677. The reversal of 240308856666 is 666658803042.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (240308856661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 316755 + ... + 762201.

It is an arithmetic number, because the mean of its divisors is an integer number (6019561548).

Almost surely, 2^240308856666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 240308856666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288938954304).

240308856666 is an abundant number, since it is smaller than the sum of its proper divisors (337569051942).

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

240308856666 is a wasteful number, since it uses less digits than its factorization.

240308856666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445556 (or 445553 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 54.

The spelling of 240308856666 in words is "two hundred forty billion, three hundred eight million, eight hundred fifty-six thousand, six hundred sixty-six".