7066986813 has 6 divisors (see below), whose sum is σ = 10207869854. Its totient is φ = 4711324536.

The previous prime is 7066986811. The next prime is 7066986893. The reversal of 7066986813 is 3186896607.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5214717369 + 1852269444 = 72213^2 + 43038^2 .

It is not a de Polignac number, because 7066986813 - 2¹ = 7066986811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7066986813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7066986811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 392610370 + ... + 392610387.

Almost surely, 2^7066986813 is an apocalyptic number.

It is an amenable number.

7066986813 is a deficient number, since it is larger than the sum of its proper divisors (3140883041).

7066986813 is a wasteful number, since it uses less digits than its factorization.

7066986813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785220763 (or 785220760 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 7066986813 is about 84065.3722587368. The cubic root of 7066986813 is about 1919.0137814333.

The spelling of 7066986813 in words is "seven billion, sixty-six million, nine hundred eighty-six thousand, eight hundred thirteen".