56670466366421 has 2 divisors, whose sum is σ = 56670466366422. Its totient is φ = 56670466366420.

The previous prime is 56670466366379. The next prime is 56670466366453. The reversal of 56670466366421 is 12466366407665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40017782573521 + 16652683792900 = 6325961^2 + 4080770^2 .

It is a cyclic number.

It is not a de Polignac number, because 56670466366421 - 2¹⁸ = 56670466104277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56670466366471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28335233183210 + 28335233183211.

It is an arithmetic number, because the mean of its divisors is an integer number (28335233183211).

Almost surely, 2^{56670466366421} is an apocalyptic number.

It is an amenable number.

56670466366421 is a deficient number, since it is larger than the sum of its proper divisors (1).

56670466366421 is an equidigital number, since it uses as much as digits as its factorization.

56670466366421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156764160, while the sum is 62.

The spelling of 56670466366421 in words is "fifty-six trillion, six hundred seventy billion, four hundred sixty-six million, three hundred sixty-six thousand, four hundred twenty-one".