66051166565 has 8 divisors (see below), whose sum is σ = 79265806368. Its totient is φ = 52837995600.

The previous prime is 66051166537. The next prime is 66051166567. The reversal of 66051166565 is 56566115066.

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

It is not a de Polignac number, because 66051166565 - 2¹⁰ = 66051165541 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 (66051166567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265727 + ... + 450236.

It is an arithmetic number, because the mean of its divisors is an integer number (9908225796).

Almost surely, 2^66051166565 is an apocalyptic number.

It is an amenable number.

66051166565 is a deficient number, since it is larger than the sum of its proper divisors (13214639803).

66051166565 is a wasteful number, since it uses less digits than its factorization.

66051166565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734419.

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

The spelling of 66051166565 in words is "sixty-six billion, fifty-one million, one hundred sixty-six thousand, five hundred sixty-five".