6697099440 has 240 divisors, whose sum is σ = 23723481600. Its totient is φ = 1755323136.

The previous prime is 6697099433. The next prime is 6697099441. The reversal of 6697099440 is 449907966.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×6697099440² = 89702281818496627200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (6697099441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1144041 + ... + 1149879.

It is an arithmetic number, because the mean of its divisors is an integer number (98847840).

Almost surely, 2^6697099440 is an apocalyptic number.

6697099440 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 6697099440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11861740800).

6697099440 is an abundant number, since it is smaller than the sum of its proper divisors (17026382160).

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

6697099440 is a wasteful number, since it uses less digits than its factorization.

6697099440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926 (or 5908 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The square root of 6697099440 is about 81835.8078105178. The cubic root of 6697099440 is about 1884.9315446766.

The spelling of 6697099440 in words is "six billion, six hundred ninety-seven million, ninety-nine thousand, four hundred forty".