6205256661 has 8 divisors (see below), whose sum is σ = 8281047520. Its totient is φ = 4133151792.

The previous prime is 6205256623. The next prime is 6205256693. The reversal of 6205256661 is 1666525026.

It is a happy number.

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

It is not a de Polignac number, because 6205256661 - 2⁹ = 6205256149 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 (6205256621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 917566 + ... + 924303.

It is an arithmetic number, because the mean of its divisors is an integer number (1035130940).

Almost surely, 2^6205256661 is an apocalyptic number.

It is an amenable number.

6205256661 is a deficient number, since it is larger than the sum of its proper divisors (2075790859).

6205256661 is a wasteful number, since it uses less digits than its factorization.

6205256661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842995.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 6205256661 is about 78773.4514985855. The cubic root of 6205256661 is about 1837.6095948701.

The spelling of 6205256661 in words is "six billion, two hundred five million, two hundred fifty-six thousand, six hundred sixty-one".