66452520960 has 1088 divisors, whose sum is σ = 286888204800. Its totient is φ = 14269022208.

The previous prime is 66452520907. The next prime is 66452520973. The reversal of 66452520960 is 6902525466.

It is a happy number.

66452520960 is a `hidden beast` number, since 6 + 64 + 5 + 2 + 520 + 9 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1796014062 + ... + 1796014098.

Almost surely, 2^66452520960 is an apocalyptic number.

66452520960 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 66452520960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143444102400).

66452520960 is an abundant number, since it is smaller than the sum of its proper divisors (220435683840).

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

66452520960 is an equidigital number, since it uses as much as digits as its factorization.

66452520960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 66452520960 in words is "sixty-six billion, four hundred fifty-two million, five hundred twenty thousand, nine hundred sixty".