66452144880 has 320 divisors, whose sum is σ = 227707140096. Its totient is φ = 16030080000.

The previous prime is 66452144873. The next prime is 66452144903. The reversal of 66452144880 is 8844125466.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 88484505 + ... + 88485255.

Almost surely, 2^66452144880 is an apocalyptic number.

66452144880 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 66452144880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113853570048).

66452144880 is an abundant number, since it is smaller than the sum of its proper divisors (161254995216).

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

66452144880 is a wasteful number, since it uses less digits than its factorization.

66452144880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 48.

The spelling of 66452144880 in words is "sixty-six billion, four hundred fifty-two million, one hundred forty-four thousand, eight hundred eighty".