66196429838720 has 256 divisors, whose sum is σ = 167446244822400. Its totient is φ = 24985454247936.

The previous prime is 66196429838719. The next prime is 66196429838771. The reversal of 66196429838720 is 2783892469166.

It is a super-2 number, since 2×66196429838720² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252674837 + ... + 252936683.

Almost surely, 2^{66196429838720} 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 66196429838720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83723122411200).

66196429838720 is an abundant number, since it is smaller than the sum of its proper divisors (101249814983680).

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

66196429838720 is a wasteful number, since it uses less digits than its factorization.

66196429838720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262205 (or 262193 counting only the distinct ones).

The product of its (nonzero) digits is 376233984, while the sum is 71.

The spelling of 66196429838720 in words is "sixty-six trillion, one hundred ninety-six billion, four hundred twenty-nine million, eight hundred thirty-eight thousand, seven hundred twenty".