6246781660 has 72 divisors (see below), whose sum is σ = 15278929344. Its totient is φ = 2139096960.

The previous prime is 6246781657. The next prime is 6246781687. The reversal of 6246781660 is 661876426.

It is a super-2 number, since 2×6246781660² = 78044562215424711200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6246781660.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 889282 + ... + 896278.

It is an arithmetic number, because the mean of its divisors is an integer number (212207352).

Almost surely, 2^6246781660 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 6246781660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7639464672).

6246781660 is an abundant number, since it is smaller than the sum of its proper divisors (9032147684).

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

6246781660 is a wasteful number, since it uses less digits than its factorization.

6246781660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7931 (or 7922 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 6246781660 is about 79036.5843138480. The cubic root of 6246781660 is about 1841.6995226104.

The spelling of 6246781660 in words is "six billion, two hundred forty-six million, seven hundred eighty-one thousand, six hundred sixty".