51666626545111 has 16 divisors (see below), whose sum is σ = 54781181280000. Its totient is φ = 48560447195008.

The previous prime is 51666626545103. The next prime is 51666626545133. The reversal of 51666626545111 is 11154562666615.

It is not a de Polignac number, because 51666626545111 - 2³ = 51666626545103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51666626545811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 801013140 + ... + 801077638.

It is an arithmetic number, because the mean of its divisors is an integer number (3423823830000).

Almost surely, 2^{51666626545111} is an apocalyptic number.

51666626545111 is a deficient number, since it is larger than the sum of its proper divisors (3114554734889).

51666626545111 is a wasteful number, since it uses less digits than its factorization.

51666626545111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128678.

The product of its digits is 7776000, while the sum is 55.

The spelling of 51666626545111 in words is "fifty-one trillion, six hundred sixty-six billion, six hundred twenty-six million, five hundred forty-five thousand, one hundred eleven".