106600005661 has 2 divisors, whose sum is σ = 106600005662. Its totient is φ = 106600005660.

The previous prime is 106600005653. The next prime is 106600005689. The reversal of 106600005661 is 166500006601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78298672761 + 28301332900 = 279819^2 + 168230^2 .

It is a cyclic number.

It is not a de Polignac number, because 106600005661 - 2³ = 106600005653 is a prime.

It is a super-2 number, since 2×106600005661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106600005601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53300002830 + 53300002831.

It is an arithmetic number, because the mean of its divisors is an integer number (53300002831).

Almost surely, 2^106600005661 is an apocalyptic number.

It is an amenable number.

106600005661 is a deficient number, since it is larger than the sum of its proper divisors (1).

106600005661 is an equidigital number, since it uses as much as digits as its factorization.

106600005661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 106600005661 in words is "one hundred six billion, six hundred million, five thousand, six hundred sixty-one".