6744991997 has 32 divisors (see below), whose sum is σ = 7370711040. Its totient is φ = 6157892160.

The previous prime is 6744991987. The next prime is 6744992069. The reversal of 6744991997 is 7991994476.

It is a cyclic number.

It is not a de Polignac number, because 6744991997 - 2⁸ = 6744991741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6744991987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8038904 + ... + 8039742.

It is an arithmetic number, because the mean of its divisors is an integer number (230334720).

Almost surely, 2^6744991997 is an apocalyptic number.

It is an amenable number.

6744991997 is a deficient number, since it is larger than the sum of its proper divisors (625719043).

6744991997 is a wasteful number, since it uses less digits than its factorization.

6744991997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113.

The product of its digits is 30862944, while the sum is 65.

The square root of 6744991997 is about 82127.9002349384. The cubic root of 6744991997 is about 1889.4140748806.

The spelling of 6744991997 in words is "six billion, seven hundred forty-four million, nine hundred ninety-one thousand, nine hundred ninety-seven".