51066106006565 has 8 divisors (see below), whose sum is σ = 65993121608568. Its totient is φ = 37710355204800.

The previous prime is 51066106006549. The next prime is 51066106006583. The reversal of 51066106006565 is 56560060166015.

It can be written as a sum of positive squares in 4 ways, for example, as 3562678900036 + 47503427106529 = 1887506^2 + 6892273^2 .

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

It is not a de Polignac number, because 51066106006565 - 2⁴ = 51066106006549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392816199986 + ... + 392816200115.

It is an arithmetic number, because the mean of its divisors is an integer number (8249140201071).

Almost surely, 2^{51066106006565} is an apocalyptic number.

It is an amenable number.

51066106006565 is a deficient number, since it is larger than the sum of its proper divisors (14927015602003).

51066106006565 is a wasteful number, since it uses less digits than its factorization.

51066106006565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785632400119.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 51066106006565 in words is "fifty-one trillion, sixty-six billion, one hundred six million, six thousand, five hundred sixty-five".