845656666051 has 2 divisors, whose sum is σ = 845656666052. Its totient is φ = 845656666050.

The previous prime is 845656666031. The next prime is 845656666061. The reversal of 845656666051 is 150666656548.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 845656666051 - 2¹¹ = 845656664003 is a prime.

It is a super-3 number, since 3×845656666051³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (845656666031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422828333025 + 422828333026.

It is an arithmetic number, because the mean of its divisors is an integer number (422828333026).

Almost surely, 2^845656666051 is an apocalyptic number.

845656666051 is a deficient number, since it is larger than the sum of its proper divisors (1).

845656666051 is an equidigital number, since it uses as much as digits as its factorization.

845656666051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104000, while the sum is 58.

The spelling of 845656666051 in words is "eight hundred forty-five billion, six hundred fifty-six million, six hundred sixty-six thousand, fifty-one".