66536040264 has 256 divisors, whose sum is σ = 186157440000. Its totient is φ = 19731833856.

The previous prime is 66536040251. The next prime is 66536040269. The reversal of 66536040264 is 46204063566.

It is not an unprimeable number, because it can be changed into a prime (66536040269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 83482714 + ... + 83483510.

It is an arithmetic number, because the mean of its divisors is an integer number (727177500).

Almost surely, 2^66536040264 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 66536040264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93078720000).

66536040264 is an abundant number, since it is smaller than the sum of its proper divisors (119621399736).

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

66536040264 is a wasteful number, since it uses less digits than its factorization.

66536040264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020 (or 1016 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 66536040264 in words is "sixty-six billion, five hundred thirty-six million, forty thousand, two hundred sixty-four".