6899699985984 has 189 divisors, whose sum is σ = 21417598363473. Its totient is φ = 2122732445184.

The previous prime is 6899699985977. The next prime is 6899699985989. The reversal of 6899699985984 is 4895899969986.

The square root of 6899699985984 is 2626728.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1020665678400 + 5879034307584 = 1010280^2 + 2424672^2 .

It is not an unprimeable number, because it can be changed into a prime (6899699985989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 819534927 + ... + 819543345.

Almost surely, 2^{6899699985984} is an apocalyptic number.

6899699985984 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

6899699985984 is the 2626728-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6899699985984

6899699985984 is an abundant number, since it is smaller than the sum of its proper divisors (14517898377489).

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

6899699985984 is an frugal number, since it uses more digits than its factorization.

6899699985984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16882 (or 8437 counting only the distinct ones).

The product of its digits is 195910410240, while the sum is 99.

The spelling of 6899699985984 in words is "six trillion, eight hundred ninety-nine billion, six hundred ninety-nine million, nine hundred eighty-five thousand, nine hundred eighty-four".