42665693177 has 2 divisors, whose sum is σ = 42665693178. Its totient is φ = 42665693176.

The previous prime is 42665693159. The next prime is 42665693207. The reversal of 42665693177 is 77139656624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41413878016 + 1251815161 = 203504^2 + 35381^2 .

It is a cyclic number.

It is not a de Polignac number, because 42665693177 - 2²⁶ = 42598584313 is a prime.

It is a super-2 number, since 2×42665693177² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42665693377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21332846588 + 21332846589.

It is an arithmetic number, because the mean of its divisors is an integer number (21332846589).

Almost surely, 2^42665693177 is an apocalyptic number.

It is an amenable number.

42665693177 is a deficient number, since it is larger than the sum of its proper divisors (1).

42665693177 is an equidigital number, since it uses as much as digits as its factorization.

42665693177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11430720, while the sum is 56.

The spelling of 42665693177 in words is "forty-two billion, six hundred sixty-five million, six hundred ninety-three thousand, one hundred seventy-seven".