166425520255011 has 24 divisors (see below), whose sum is σ = 250082263367664. Its totient is φ = 110600345691360.

The previous prime is 166425520254997. The next prime is 166425520255103. The reversal of 166425520255011 is 110552025524661.

It is a happy number.

166425520255011 is a `hidden beast` number, since 1 + 6 + 6 + 42 + 5 + 52 + 0 + 2 + 550 + 1 + 1 = 666.

It is not a de Polignac number, because 166425520255011 - 2¹⁸ = 166425519992867 is a prime.

It is a super-2 number, since 2×166425520255011² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166425520255411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1080173260 + ... + 1080327321.

It is an arithmetic number, because the mean of its divisors is an integer number (10420094306986).

Almost surely, 2^{166425520255011} is an apocalyptic number.

166425520255011 is a deficient number, since it is larger than the sum of its proper divisors (83656743112653).

166425520255011 is an equidigital number, since it uses as much as digits as its factorization.

166425520255011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160500913 (or 2160500901 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

Adding to 166425520255011 its reverse (110552025524661), we get a palindrome (276977545779672).

The spelling of 166425520255011 in words is "one hundred sixty-six trillion, four hundred twenty-five billion, five hundred twenty million, two hundred fifty-five thousand, eleven".