66240241650 has 288 divisors, whose sum is σ = 201724338816. Its totient is φ = 15442560000.

The previous prime is 66240241607. The next prime is 66240241663. The reversal of 66240241650 is 5614204266.

66240241650 is a `hidden beast` number, since 6 + 624 + 0 + 24 + 1 + 6 + 5 + 0 = 666.

It is a super-2 number, since 2×66240241650² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 14407152 + ... + 14411748.

It is an arithmetic number, because the mean of its divisors is an integer number (700431732).

Almost surely, 2^66240241650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66240241650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100862169408).

66240241650 is an abundant number, since it is smaller than the sum of its proper divisors (135484097166).

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

66240241650 is a wasteful number, since it uses less digits than its factorization.

66240241650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738 (or 4730 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 66240241650 in words is "sixty-six billion, two hundred forty million, two hundred forty-one thousand, six hundred fifty".