66412829880 has 160 divisors (see below), whose sum is σ = 223741148400. Its totient is φ = 17668813824.

The previous prime is 66412829831. The next prime is 66412829893. The reversal of 66412829880 is 8892821466.

66412829880 is a `hidden beast` number, since 66 + 412 + 8 + 2 + 98 + 80 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1379251 + ... + 1426589.

Almost surely, 2^66412829880 is an apocalyptic number.

66412829880 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 66412829880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111870574200).

66412829880 is an abundant number, since it is smaller than the sum of its proper divisors (157328318520).

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

66412829880 is a wasteful number, since it uses less digits than its factorization.

66412829880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47795 (or 47782 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 66412829880 in words is "sixty-six billion, four hundred twelve million, eight hundred twenty-nine thousand, eight hundred eighty".