3166672120561 has 2 divisors, whose sum is σ = 3166672120562. Its totient is φ = 3166672120560.

The previous prime is 3166672120559. The next prime is 3166672120583. The reversal of 3166672120561 is 1650212766613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2926258418161 + 240413702400 = 1710631^2 + 490320^2 .

It is a cyclic number.

It is not a de Polignac number, because 3166672120561 - 2¹ = 3166672120559 is a prime.

Together with 3166672120559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3166672120511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1583336060280 + 1583336060281.

It is an arithmetic number, because the mean of its divisors is an integer number (1583336060281).

Almost surely, 2^{3166672120561} is an apocalyptic number.

It is an amenable number.

3166672120561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3166672120561 is an equidigital number, since it uses as much as digits as its factorization.

3166672120561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 3166672120561 in words is "three trillion, one hundred sixty-six billion, six hundred seventy-two million, one hundred twenty thousand, five hundred sixty-one".