51666022358743 has 4 divisors (see below), whose sum is σ = 55640331770968. Its totient is φ = 47691712946520.

The previous prime is 51666022358663. The next prime is 51666022358767. The reversal of 51666022358743 is 34785322066615.

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 51666022358743 - 2³³ = 51657432424151 is a prime.

It is a super-4 number, since 4×51666022358743⁴ (a number of 56 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51666022355743) 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, 1987154706093 + ... + 1987154706118.

It is an arithmetic number, because the mean of its divisors is an integer number (13910082942742).

Almost surely, 2^{51666022358743} is an apocalyptic number.

51666022358743 is a deficient number, since it is larger than the sum of its proper divisors (3974309412225).

51666022358743 is a wasteful number, since it uses less digits than its factorization.

51666022358743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3974309412224.

The product of its (nonzero) digits is 43545600, while the sum is 58.

The spelling of 51666022358743 in words is "fifty-one trillion, six hundred sixty-six billion, twenty-two million, three hundred fifty-eight thousand, seven hundred forty-three".