6661006005 has 32 divisors (see below), whose sum is σ = 10777785984. Its totient is φ = 3512549376.

The previous prime is 6661006003. The next prime is 6661006019. The reversal of 6661006005 is 5006001666.

It is not a de Polignac number, because 6661006005 - 2¹ = 6661006003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661006003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2505637 + ... + 2508293.

It is an arithmetic number, because the mean of its divisors is an integer number (336805812).

Almost surely, 2^6661006005 is an apocalyptic number.

It is an amenable number.

6661006005 is a deficient number, since it is larger than the sum of its proper divisors (4116779979).

6661006005 is a wasteful number, since it uses less digits than its factorization.

6661006005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4485.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 6661006005 is about 81614.9863995578. The cubic root of 6661006005 is about 1881.5392182648.

The spelling of 6661006005 in words is "six billion, six hundred sixty-one million, six thousand, five".