6691244927 has 4 divisors (see below), whose sum is σ = 6712760496. Its totient is φ = 6669729360.

The previous prime is 6691244887. The next prime is 6691244951. The reversal of 6691244927 is 7294421966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6691244927 - 2⁸ = 6691244671 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 (6691244957) 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, 10757318 + ... + 10757939.

It is an arithmetic number, because the mean of its divisors is an integer number (1678190124).

Almost surely, 2^6691244927 is an apocalyptic number.

6691244927 is a deficient number, since it is larger than the sum of its proper divisors (21515569).

6691244927 is a wasteful number, since it uses less digits than its factorization.

6691244927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21515568.

The product of its digits is 1306368, while the sum is 50.

The square root of 6691244927 is about 81800.0301161314. The cubic root of 6691244927 is about 1884.3821240631.

The spelling of 6691244927 in words is "six billion, six hundred ninety-one million, two hundred forty-four thousand, nine hundred twenty-seven".