66374027520 has 288 divisors, whose sum is σ = 229935283200. Its totient is φ = 16251617280.

The previous prime is 66374027513. The next prime is 66374027521. The reversal of 66374027520 is 2572047366.

It is not an unprimeable number, because it can be changed into a prime (66374027521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2664081 + ... + 2688879.

It is an arithmetic number, because the mean of its divisors is an integer number (798386400).

Almost surely, 2^66374027520 is an apocalyptic number.

66374027520 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 66374027520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114967641600).

66374027520 is an abundant number, since it is smaller than the sum of its proper divisors (163561255680).

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

66374027520 is a wasteful number, since it uses less digits than its factorization.

66374027520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24881 (or 24867 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 42.

The spelling of 66374027520 in words is "sixty-six billion, three hundred seventy-four million, twenty-seven thousand, five hundred twenty".