6694378043 has 4 divisors (see below), whose sum is σ = 6701403528. Its totient is φ = 6687352560.

The previous prime is 6694378037. The next prime is 6694378063. The reversal of 6694378043 is 3408734966.

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

It is a cyclic number.

It is not a de Polignac number, because 6694378043 - 2¹⁸ = 6694115899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6694377982 and 6694378000.

It is not an unprimeable number, because it can be changed into a prime (6694378013) 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, 3511313 + ... + 3513218.

It is an arithmetic number, because the mean of its divisors is an integer number (1675350882).

Almost surely, 2^6694378043 is an apocalyptic number.

6694378043 is a deficient number, since it is larger than the sum of its proper divisors (7025485).

6694378043 is an equidigital number, since it uses as much as digits as its factorization.

6694378043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025484.

The product of its (nonzero) digits is 2612736, while the sum is 50.

The square root of 6694378043 is about 81819.1789435704. The cubic root of 6694378043 is about 1884.6761932331.

The spelling of 6694378043 in words is "six billion, six hundred ninety-four million, three hundred seventy-eight thousand, forty-three".