6677509645 has 8 divisors (see below), whose sum is σ = 8484365304. Its totient is φ = 5027771904.

The previous prime is 6677509607. The next prime is 6677509693. The reversal of 6677509645 is 5469057766.

It can be written as a sum of positive squares in 4 ways, for example, as 3697004809 + 2980504836 = 60803^2 + 54594^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6677509645 - 2⁹ = 6677509133 is a prime.

It is a super-3 number, since 3×6677509645³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39279384 + ... + 39279553.

It is an arithmetic number, because the mean of its divisors is an integer number (1060545663).

Almost surely, 2^6677509645 is an apocalyptic number.

It is an amenable number.

6677509645 is a deficient number, since it is larger than the sum of its proper divisors (1806855659).

6677509645 is a wasteful number, since it uses less digits than its factorization.

6677509645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78558959.

The product of its (nonzero) digits is 9525600, while the sum is 55.

The square root of 6677509645 is about 81716.0305264518. The cubic root of 6677509645 is about 1883.0918683997.

The spelling of 6677509645 in words is "six billion, six hundred seventy-seven million, five hundred nine thousand, six hundred forty-five".