66590520000 has 420 divisors, whose sum is σ = 230371726200. Its totient is φ = 16969216000.

The previous prime is 66590519951. The next prime is 66590520001. The reversal of 66590520000 is 2509566.

It is not an unprimeable number, because it can be changed into a prime (66590520001) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 63479476 + ... + 63480524.

It is an arithmetic number, because the mean of its divisors is an integer number (548504110).

Almost surely, 2^66590520000 is an apocalyptic number.

66590520000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66590520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115185863100).

66590520000 is an abundant number, since it is smaller than the sum of its proper divisors (163781206200).

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

66590520000 is a wasteful number, since it uses less digits than its factorization.

66590520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The spelling of 66590520000 in words is "sixty-six billion, five hundred ninety million, five hundred twenty thousand".