6744664477 has 2 divisors, whose sum is σ = 6744664478. Its totient is φ = 6744664476.

The previous prime is 6744664471. The next prime is 6744664481. The reversal of 6744664477 is 7744664476.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6447929401 + 296735076 = 80299^2 + 17226^2 .

It is a cyclic number.

It is not a de Polignac number, because 6744664477 - 2⁷ = 6744664349 is a prime.

It is a super-3 number, since 3×6744664477³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6744664471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3372332238 + 3372332239.

It is an arithmetic number, because the mean of its divisors is an integer number (3372332239).

Almost surely, 2^6744664477 is an apocalyptic number.

It is an amenable number.

6744664477 is a deficient number, since it is larger than the sum of its proper divisors (1).

6744664477 is an equidigital number, since it uses as much as digits as its factorization.

6744664477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18966528, while the sum is 55.

The square root of 6744664477 is about 82125.9062476634. The cubic root of 6744664477 is about 1889.3834926395.

Subtracting 6744664477 from its reverse (7744664476), we obtain a palindrome (999999999).

The spelling of 6744664477 in words is "six billion, seven hundred forty-four million, six hundred sixty-four thousand, four hundred seventy-seven".