6601773420 has 144 divisors (see below), whose sum is σ = 21973285152. Its totient is φ = 1591096320.

The previous prime is 6601773401. The next prime is 6601773449. The reversal of 6601773420 is 243771066.

6601773420 is a `hidden beast` number, since 6 + 60 + 177 + 3 + 420 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 332904 + ... + 352176.

It is an arithmetic number, because the mean of its divisors is an integer number (152592258).

Almost surely, 2^6601773420 is an apocalyptic number.

6601773420 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 6601773420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10986642576).

6601773420 is an abundant number, since it is smaller than the sum of its proper divisors (15371511732).

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

6601773420 is a wasteful number, since it uses less digits than its factorization.

6601773420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19472 (or 19467 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 6601773420 is about 81251.2979588634. The cubic root of 6601773420 is about 1875.9454474554.

The spelling of 6601773420 in words is "six billion, six hundred one million, seven hundred seventy-three thousand, four hundred twenty".