6697653864 has 128 divisors (see below), whose sum is σ = 18911232000. Its totient is φ = 1958826240.

The previous prime is 6697653857. The next prime is 6697653869. The reversal of 6697653864 is 4683567966.

It is a junction number, because it is equal to n+sod(n) for n = 6697653798 and 6697653807.

It is not an unprimeable number, because it can be changed into a prime (6697653869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1237837 + ... + 1243235.

It is an arithmetic number, because the mean of its divisors is an integer number (147744000).

Almost surely, 2^6697653864 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 6697653864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9455616000).

6697653864 is an abundant number, since it is smaller than the sum of its proper divisors (12213578136).

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

6697653864 is a wasteful number, since it uses less digits than its factorization.

6697653864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5583 (or 5579 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 60.

The square root of 6697653864 is about 81839.1951573328. The cubic root of 6697653864 is about 1884.9835583610.

The spelling of 6697653864 in words is "six billion, six hundred ninety-seven million, six hundred fifty-three thousand, eight hundred sixty-four".