66422134771601 has 12 divisors (see below), whose sum is σ = 77603973532020. Its totient is φ = 56684641517280.

The previous prime is 66422134771567. The next prime is 66422134771607. The reversal of 66422134771601 is 10617743122466.

It can be written as a sum of positive squares in 2 ways, for example, as 35438494744576 + 30983640027025 = 5953024^2 + 5566295^2 .

It is not a de Polignac number, because 66422134771601 - 2³⁰ = 66421061029777 is a prime.

It is a super-2 number, since 2×66422134771601² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66422134771601.

It is not an unprimeable number, because it can be changed into a prime (66422134771607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2959713170 + ... + 2959735611.

It is an arithmetic number, because the mean of its divisors is an integer number (6466997794335).

Almost surely, 2^{66422134771601} is an apocalyptic number.

It is an amenable number.

66422134771601 is a deficient number, since it is larger than the sum of its proper divisors (11181838760419).

66422134771601 is a wasteful number, since it uses less digits than its factorization.

66422134771601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919449024 (or 5919449017 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 66422134771601 in words is "sixty-six trillion, four hundred twenty-two billion, one hundred thirty-four million, seven hundred seventy-one thousand, six hundred one".