6940990699776 has 243 divisors, whose sum is σ = 23282917913073. Its totient is φ = 1982887280640.

The previous prime is 6940990699771. The next prime is 6940990699787. The reversal of 6940990699776 is 6779960990496.

The square root of 6940990699776 is 2634576.

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

6940990699776 is a `hidden beast` number, since 69 + 409 + 9 + 0 + 69 + 97 + 7 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2431653509376 + 4509337190400 = 1559376^2 + 2123520^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6940990699695 and 6940990699704.

It is not an unprimeable number, because it can be changed into a prime (6940990699771) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 885213616 + ... + 885221456.

Almost surely, 2^{6940990699776} is an apocalyptic number.

6940990699776 is the 2634576-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6940990699776

6940990699776 is an abundant number, since it is smaller than the sum of its proper divisors (16341927213297).

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

6940990699776 is an frugal number, since it uses more digits than its factorization.

6940990699776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15718 (or 7853 counting only the distinct ones).

The product of its (nonzero) digits is 2499898464, while the sum is 81.

Multiplying 6940990699776 by its sum of digits (81), we get a square (562220246681856 = 23711184²).

The spelling of 6940990699776 in words is "six trillion, nine hundred forty billion, nine hundred ninety million, six hundred ninety-nine thousand, seven hundred seventy-six".