6693078641 has 4 divisors (see below), whose sum is σ = 6693534372. Its totient is φ = 6692622912.

The previous prime is 6693078611. The next prime is 6693078647. The reversal of 6693078641 is 1468703966.

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 6380814400 + 312264241 = 79880^2 + 17671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6693078641 is a prime.

It is a super-2 number, since 2×6693078641² = 89594603389220813762, which contains 22 as substring.

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 6693078641.

It is not an unprimeable number, because it can be changed into a prime (6693078647) 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, 205076 + ... + 235461.

It is an arithmetic number, because the mean of its divisors is an integer number (1673383593).

Almost surely, 2^6693078641 is an apocalyptic number.

It is an amenable number.

6693078641 is a deficient number, since it is larger than the sum of its proper divisors (455731).

6693078641 is a wasteful number, since it uses less digits than its factorization.

6693078641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455730.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 6693078641 is about 81811.2378649779. The cubic root of 6693078641 is about 1884.5542446137.

The spelling of 6693078641 in words is "six billion, six hundred ninety-three million, seventy-eight thousand, six hundred forty-one".