66010000100165 has 48 divisors (see below), whose sum is σ = 90337403411136. Its totient is φ = 45918033004800.

The previous prime is 66010000099973. The next prime is 66010000100167. The reversal of 66010000100165 is 56100100001066.

It is not a de Polignac number, because 66010000100165 - 2¹² = 66010000096069 is a prime.

It is a super-3 number, since 3×66010000100165³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66010000100167) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1133832137 + ... + 1133890353.

It is an arithmetic number, because the mean of its divisors is an integer number (1882029237732).

Almost surely, 2^{66010000100165} is an apocalyptic number.

It is an amenable number.

66010000100165 is a deficient number, since it is larger than the sum of its proper divisors (24327403310971).

66010000100165 is a wasteful number, since it uses less digits than its factorization.

66010000100165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97250 (or 97227 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

Subtracting from 66010000100165 its reverse (56100100001066), we obtain a palindrome (9909900099099).

It can be divided in two parts, 660100001001 and 65, that added together give a palindrome (660100001066).

The spelling of 66010000100165 in words is "sixty-six trillion, ten billion, one hundred thousand, one hundred sixty-five".