6785557487 has 4 divisors (see below), whose sum is σ = 6787886616. Its totient is φ = 6783228360.

The previous prime is 6785557433. The next prime is 6785557501. The reversal of 6785557487 is 7847555876.

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 6785557487 - 2²⁶ = 6718448623 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 (6785554487) 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, 1160189 + ... + 1166022.

It is an arithmetic number, because the mean of its divisors is an integer number (1696971654).

Almost surely, 2^6785557487 is an apocalyptic number.

6785557487 is a deficient number, since it is larger than the sum of its proper divisors (2329129).

6785557487 is a wasteful number, since it uses less digits than its factorization.

6785557487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329128.

The product of its digits is 65856000, while the sum is 62.

The square root of 6785557487 is about 82374.4953671948. The cubic root of 6785557487 is about 1893.1942556546.

The spelling of 6785557487 in words is "six billion, seven hundred eighty-five million, five hundred fifty-seven thousand, four hundred eighty-seven".