6719401656 has 160 divisors (see below), whose sum is σ = 20653974000. Its totient is φ = 2024040960.

The previous prime is 6719401651. The next prime is 6719401669. The reversal of 6719401656 is 6561049176.

It is a super-3 number, since 3×6719401656³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6719401651) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1230420 + ... + 1235868.

Almost surely, 2^6719401656 is an apocalyptic number.

6719401656 is a gapful number since it is divisible by the number (66) 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 6719401656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10326987000).

6719401656 is an abundant number, since it is smaller than the sum of its proper divisors (13934572344).

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

6719401656 is a wasteful number, since it uses less digits than its factorization.

6719401656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5651 (or 5638 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 6719401656 is about 81971.9565217276. The cubic root of 6719401656 is about 1887.0215824506.

The spelling of 6719401656 in words is "six billion, seven hundred nineteen million, four hundred one thousand, six hundred fifty-six".