66699118840224 has 384 divisors, whose sum is σ = 190174991892480. Its totient is φ = 20347399987200.

The previous prime is 66699118840219. The next prime is 66699118840271. The reversal of 66699118840224 is 42204881199666.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 103089827869 + ... + 103089828515.

It is an arithmetic number, because the mean of its divisors is an integer number (495247374720).

Almost surely, 2^{66699118840224} 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 66699118840224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95087495946240).

66699118840224 is an abundant number, since it is smaller than the sum of its proper divisors (123475873052256).

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

66699118840224 is a wasteful number, since it uses less digits than its factorization.

66699118840224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004 (or 1996 counting only the distinct ones).

The product of its (nonzero) digits is 71663616, while the sum is 66.

The spelling of 66699118840224 in words is "sixty-six trillion, six hundred ninety-nine billion, one hundred eighteen million, eight hundred forty thousand, two hundred twenty-four".