6661330029971 has 2 divisors, whose sum is σ = 6661330029972. Its totient is φ = 6661330029970.

The previous prime is 6661330029941. The next prime is 6661330030039. The reversal of 6661330029971 is 1799200331666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6661330029971 - 2³⁸ = 6386452123027 is a prime.

It is not a weakly prime, because it can be changed into another prime (6661330029941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330665014985 + 3330665014986.

It is an arithmetic number, because the mean of its divisors is an integer number (3330665014986).

Almost surely, 2^{6661330029971} is an apocalyptic number.

6661330029971 is a deficient number, since it is larger than the sum of its proper divisors (1).

6661330029971 is an equidigital number, since it uses as much as digits as its factorization.

6661330029971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The spelling of 6661330029971 in words is "six trillion, six hundred sixty-one billion, three hundred thirty million, twenty-nine thousand, nine hundred seventy-one".