51466659911 has 4 divisors (see below), whose sum is σ = 54494110512. Its totient is φ = 48439209312.

The previous prime is 51466659869. The next prime is 51466659917. The reversal of 51466659911 is 11995666415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51466659911 - 2¹⁸ = 51466397767 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 (51466659917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513725275 + ... + 1513725308.

It is an arithmetic number, because the mean of its divisors is an integer number (13623527628).

Almost surely, 2^51466659911 is an apocalyptic number.

51466659911 is a deficient number, since it is larger than the sum of its proper divisors (3027450601).

51466659911 is a wasteful number, since it uses less digits than its factorization.

51466659911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027450600.

The product of its digits is 1749600, while the sum is 53.

The spelling of 51466659911 in words is "fifty-one billion, four hundred sixty-six million, six hundred fifty-nine thousand, nine hundred eleven".