6061566661 has 4 divisors (see below), whose sum is σ = 6063546112. Its totient is φ = 6059587212.

The previous prime is 6061566659. The next prime is 6061566683. The reversal of 6061566661 is 1666651606.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6061566661 - 2¹ = 6061566659 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 (6061566601) 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, 985125 + ... + 991258.

It is an arithmetic number, because the mean of its divisors is an integer number (1515886528).

Almost surely, 2^6061566661 is an apocalyptic number.

It is an amenable number.

6061566661 is a deficient number, since it is larger than the sum of its proper divisors (1979451).

6061566661 is a wasteful number, since it uses less digits than its factorization.

6061566661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979450.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 6061566661 is about 77856.0637394416. The cubic root of 6061566661 is about 1823.3146796892.

The spelling of 6061566661 in words is "six billion, sixty-one million, five hundred sixty-six thousand, six hundred sixty-one".