6640470101 has 2 divisors, whose sum is σ = 6640470102. Its totient is φ = 6640470100.

The previous prime is 6640470017. The next prime is 6640470143. The reversal of 6640470101 is 1010740466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4389062500 + 2251407601 = 66250^2 + 47449^2 .

It is a cyclic number.

It is not a de Polignac number, because 6640470101 - 2²⁶ = 6573361237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6640470191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320235050 + 3320235051.

It is an arithmetic number, because the mean of its divisors is an integer number (3320235051).

Almost surely, 2^6640470101 is an apocalyptic number.

It is an amenable number.

6640470101 is a deficient number, since it is larger than the sum of its proper divisors (1).

6640470101 is an equidigital number, since it uses as much as digits as its factorization.

6640470101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 6640470101 is about 81489.0796426122. The cubic root of 6640470101 is about 1879.6036305048.

The spelling of 6640470101 in words is "six billion, six hundred forty million, four hundred seventy thousand, one hundred one".