6640551510727 has 4 divisors (see below), whose sum is σ = 6640586383600. Its totient is φ = 6640516637856.

The previous prime is 6640551510689. The next prime is 6640551510787. The reversal of 6640551510727 is 7270151550466.

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 6640551510727 - 2¹⁹ = 6640550986439 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 (6640551510787) 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, 17149227 + ... + 17532172.

It is an arithmetic number, because the mean of its divisors is an integer number (1660146595900).

Almost surely, 2^{6640551510727} is an apocalyptic number.

6640551510727 is a deficient number, since it is larger than the sum of its proper divisors (34872873).

6640551510727 is a wasteful number, since it uses less digits than its factorization.

6640551510727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34872872.

The product of its (nonzero) digits is 1764000, while the sum is 49.

The spelling of 6640551510727 in words is "six trillion, six hundred forty billion, five hundred fifty-one million, five hundred ten thousand, seven hundred twenty-seven".