166797066255 has 32 divisors (see below), whose sum is σ = 269075036160. Its totient is φ = 88227480960.

The previous prime is 166797066209. The next prime is 166797066269. The reversal of 166797066255 is 552660797661.

It is not a de Polignac number, because 166797066255 - 2¹⁷ = 166796935183 is a prime.

It is a super-2 number, since 2×166797066255² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1099945 + ... + 1242365.

It is an arithmetic number, because the mean of its divisors is an integer number (8408594880).

Almost surely, 2^166797066255 is an apocalyptic number.

166797066255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166797066255 is a deficient number, since it is larger than the sum of its proper divisors (102277969905).

166797066255 is a wasteful number, since it uses less digits than its factorization.

166797066255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143071.

The product of its (nonzero) digits is 28576800, while the sum is 60.

The spelling of 166797066255 in words is "one hundred sixty-six billion, seven hundred ninety-seven million, sixty-six thousand, two hundred fifty-five".