51665556055 has 8 divisors (see below), whose sum is σ = 62001446832. Its totient is φ = 41330591808.

The previous prime is 51665556053. The next prime is 51665556073. The reversal of 51665556055 is 55065556615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51665556055 - 2¹ = 51665556053 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 (51665556053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102397 + ... + 337366.

It is an arithmetic number, because the mean of its divisors is an integer number (7750180854).

Almost surely, 2^51665556055 is an apocalyptic number.

51665556055 is a deficient number, since it is larger than the sum of its proper divisors (10335890777).

51665556055 is a wasteful number, since it uses less digits than its factorization.

51665556055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463265.

The product of its (nonzero) digits is 3375000, while the sum is 49.

The spelling of 51665556055 in words is "fifty-one billion, six hundred sixty-five million, five hundred fifty-six thousand, fifty-five".