6997580757997 has 4 divisors (see below), whose sum is σ = 6998580847996. Its totient is φ = 6996580668000.

The previous prime is 6997580757989. The next prime is 6997580758079. The reversal of 6997580757997 is 7997570857996.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5462742237001 + 1534838520996 = 2337251^2 + 1238886^2 .

It is a cyclic number.

It is not a de Polignac number, because 6997580757997 - 2³ = 6997580757989 is a prime.

It is a super-2 number, since 2×6997580757997² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6997580757977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500034504 + ... + 500048497.

It is an arithmetic number, because the mean of its divisors is an integer number (1749645211999).

Almost surely, 2^{6997580757997} is an apocalyptic number.

It is an amenable number.

6997580757997 is a deficient number, since it is larger than the sum of its proper divisors (1000089999).

6997580757997 is a wasteful number, since it uses less digits than its factorization.

6997580757997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000089998.

The product of its (nonzero) digits is 18903553200, while the sum is 88.

Subtracting 6997580757997 from its reverse (7997570857996), we obtain a palindrome (999990099999).

It can be divided in two parts, 6997580 and 757997, that added together give a palindrome (7755577).

The spelling of 6997580757997 in words is "six trillion, nine hundred ninety-seven billion, five hundred eighty million, seven hundred fifty-seven thousand, nine hundred ninety-seven".