66361565088 has 768 divisors, whose sum is σ = 259028582400. Its totient is φ = 16034734080.

The previous prime is 66361565077. The next prime is 66361565111. The reversal of 66361565088 is 88056516366.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 46308820 + ... + 46310252.

It is an arithmetic number, because the mean of its divisors is an integer number (337276800).

Almost surely, 2^66361565088 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 66361565088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129514291200).

66361565088 is an abundant number, since it is smaller than the sum of its proper divisors (192667017312).

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

66361565088 is a wasteful number, since it uses less digits than its factorization.

66361565088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 66361565088 in words is "sixty-six billion, three hundred sixty-one million, five hundred sixty-five thousand, eighty-eight".