6865949720 has 64 divisors (see below), whose sum is σ = 17694262080. Its totient is φ = 2348845056.

The previous prime is 6865949693. The next prime is 6865949729. The reversal of 6865949720 is 279495686.

It is a happy number.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6865949729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101132 + ... + 154788.

It is an arithmetic number, because the mean of its divisors is an integer number (276472845).

Almost surely, 2^6865949720 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 6865949720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8847131040).

6865949720 is an abundant number, since it is smaller than the sum of its proper divisors (10828312360).

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

6865949720 is a wasteful number, since it uses less digits than its factorization.

6865949720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54132 (or 54128 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 56.

The square root of 6865949720 is about 82861.0265444497. The cubic root of 6865949720 is about 1900.6414934540.

The spelling of 6865949720 in words is "six billion, eight hundred sixty-five million, nine hundred forty-nine thousand, seven hundred twenty".