6505501685 has 4 divisors (see below), whose sum is σ = 7806602028. Its totient is φ = 5204401344.

The previous prime is 6505501669. The next prime is 6505501699. The reversal of 6505501685 is 5861055056.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1552438801 + 4953062884 = 39401^2 + 70378^2 .

It is a cyclic number.

It is not a de Polignac number, because 6505501685 - 2⁴ = 6505501669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650550164 + ... + 650550173.

It is an arithmetic number, because the mean of its divisors is an integer number (1951650507).

Almost surely, 2^6505501685 is an apocalyptic number.

It is an amenable number.

6505501685 is a deficient number, since it is larger than the sum of its proper divisors (1301100343).

6505501685 is a wasteful number, since it uses less digits than its factorization.

6505501685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1301100342.

The product of its (nonzero) digits is 180000, while the sum is 41.

The square root of 6505501685 is about 80656.6902680739. The cubic root of 6505501685 is about 1866.7819709635.

The spelling of 6505501685 in words is "six billion, five hundred five million, five hundred one thousand, six hundred eighty-five".