66425240700 has 2016 divisors, whose sum is σ = 306020413440. Its totient is φ = 12093235200.

The previous prime is 66425240699. The next prime is 66425240723. The reversal of 66425240700 is 704252466.

66425240700 is a `hidden beast` number, since 6 + 64 + 2 + 524 + 0 + 70 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 671 ways as a sum of consecutive naturals, for example, 2142749685 + ... + 2142749715.

It is an arithmetic number, because the mean of its divisors is an integer number (151795840).

Almost surely, 2^66425240700 is an apocalyptic number.

66425240700 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 66425240700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153010206720).

66425240700 is an abundant number, since it is smaller than the sum of its proper divisors (239595172740).

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

66425240700 is a wasteful number, since it uses less digits than its factorization.

66425240700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 66425240700 in words is "sixty-six billion, four hundred twenty-five million, two hundred forty thousand, seven hundred".