6772730509 has 18 divisors (see below), whose sum is σ = 7083311582. Its totient is φ = 6473932800.

The previous prime is 6772730479. The next prime is 6772730513. The reversal of 6772730509 is 9050372776.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 2148322500 + 4624408009 = 46350^2 + 68003^2 .

It is not a de Polignac number, because 6772730509 - 2⁵ = 6772730477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6772731509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26352909 + ... + 26353165.

Almost surely, 2^6772730509 is an apocalyptic number.

It is an amenable number.

6772730509 is a deficient number, since it is larger than the sum of its proper divisors (310581073).

6772730509 is an frugal number, since it uses more digits than its factorization.

6772730509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 555660, while the sum is 46.

The square root of 6772730509 is about 82296.6008350284. The cubic root of 6772730509 is about 1892.0005792907. Note that the first 3 decimals are identical.

The spelling of 6772730509 in words is "six billion, seven hundred seventy-two million, seven hundred thirty thousand, five hundred nine".