6740666641 has 4 divisors (see below), whose sum is σ = 6740831412. Its totient is φ = 6740501872.

The previous prime is 6740666599. The next prime is 6740666663. The reversal of 6740666641 is 1466660476.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5888260225 + 852406416 = 76735^2 + 29196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6740666641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6740666591 and 6740666600.

It is not an unprimeable number, because it can be changed into a prime (6740666341) 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, 30951 + ... + 120163.

It is an arithmetic number, because the mean of its divisors is an integer number (1685207853).

Almost surely, 2^6740666641 is an apocalyptic number.

It is an amenable number.

6740666641 is a deficient number, since it is larger than the sum of its proper divisors (164771).

6740666641 is an equidigital number, since it uses as much as digits as its factorization.

6740666641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164770.

The product of its (nonzero) digits is 870912, while the sum is 46.

The square root of 6740666641 is about 82101.5629631982. The cubic root of 6740666641 is about 1889.0101141331.

The spelling of 6740666641 in words is "six billion, seven hundred forty million, six hundred sixty-six thousand, six hundred forty-one".