51006666309091 has 16 divisors (see below), whose sum is σ = 53704209605760. Its totient is φ = 48310422874560.

The previous prime is 51006666309083. The next prime is 51006666309101. The reversal of 51006666309091 is 19090366660015.

It is a cyclic number.

It is not a de Polignac number, because 51006666309091 - 2³ = 51006666309083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51006666309061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2114604511 + ... + 2114628631.

It is an arithmetic number, because the mean of its divisors is an integer number (3356513100360).

Almost surely, 2^{51006666309091} is an apocalyptic number.

51006666309091 is a deficient number, since it is larger than the sum of its proper divisors (2697543296669).

51006666309091 is a wasteful number, since it uses less digits than its factorization.

51006666309091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46434.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The spelling of 51006666309091 in words is "fifty-one trillion, six billion, six hundred sixty-six million, three hundred nine thousand, ninety-one".