51665650120067 has 4 divisors (see below), whose sum is σ = 51670797649296. Its totient is φ = 51660502590840.

The previous prime is 51665650120061. The next prime is 51665650120093. The reversal of 51665650120067 is 76002105656615.

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 51665650120067 - 2²² = 51665645925763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51665650119997 and 51665650120024.

It is not an unprimeable number, because it can be changed into a prime (51665650120061) 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, 2573749559 + ... + 2573769632.

It is an arithmetic number, because the mean of its divisors is an integer number (12917699412324).

Almost surely, 2^{51665650120067} is an apocalyptic number.

51665650120067 is a deficient number, since it is larger than the sum of its proper divisors (5147529229).

51665650120067 is a wasteful number, since it uses less digits than its factorization.

51665650120067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5147529228.

The product of its (nonzero) digits is 2268000, while the sum is 50.

The spelling of 51665650120067 in words is "fifty-one trillion, six hundred sixty-five billion, six hundred fifty million, one hundred twenty thousand, sixty-seven".