66106100051 has 2 divisors, whose sum is σ = 66106100052. Its totient is φ = 66106100050.

The previous prime is 66106099993. The next prime is 66106100059. The reversal of 66106100051 is 15000160166.

66106100051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66106100051 is a prime.

It is not a weakly prime, because it can be changed into another prime (66106100059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33053050025 + 33053050026.

It is an arithmetic number, because the mean of its divisors is an integer number (33053050026).

Almost surely, 2^66106100051 is an apocalyptic number.

66106100051 is a deficient number, since it is larger than the sum of its proper divisors (1).

66106100051 is an equidigital number, since it uses as much as digits as its factorization.

66106100051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The spelling of 66106100051 in words is "sixty-six billion, one hundred six million, one hundred thousand, fifty-one".