66770671111101 has 6 divisors (see below), whose sum is σ = 96446524938270. Its totient is φ = 44513780740728.

The previous prime is 66770671111093. The next prime is 66770671111127. The reversal of 66770671111101 is 10111117607766.

It can be written as a sum of positive squares in only one way, i.e., 40753540822500 + 26017130288601 = 6383850^2 + 5100699^2 .

It is not a de Polignac number, because 66770671111101 - 2³ = 66770671111093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66770671111801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3709481728386 + ... + 3709481728403.

It is an arithmetic number, because the mean of its divisors is an integer number (16074420823045).

Almost surely, 2^{66770671111101} is an apocalyptic number.

It is an amenable number.

66770671111101 is a deficient number, since it is larger than the sum of its proper divisors (29675853827169).

66770671111101 is a wasteful number, since it uses less digits than its factorization.

66770671111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7418963456795 (or 7418963456792 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 45.

Adding to 66770671111101 its reverse (10111117607766), we get a palindrome (76881788718867).

The spelling of 66770671111101 in words is "sixty-six trillion, seven hundred seventy billion, six hundred seventy-one million, one hundred eleven thousand, one hundred one".