166099798755 has 24 divisors (see below), whose sum is σ = 314079620400. Its totient is φ = 80533235520.

The previous prime is 166099798741. The next prime is 166099798889. The reversal of 166099798755 is 557897990661.

166099798755 is a `hidden beast` number, since 1 + 6 + 609 + 9 + 7 + 9 + 8 + 7 + 5 + 5 = 666.

166099798755 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166099798755 - 2⁹ = 166099798243 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167777080 + ... + 167778069.

It is an arithmetic number, because the mean of its divisors is an integer number (13086650850).

Almost surely, 2^166099798755 is an apocalyptic number.

166099798755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166099798755 is a deficient number, since it is larger than the sum of its proper divisors (147979821645).

166099798755 is a wasteful number, since it uses less digits than its factorization.

166099798755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335555171 (or 335555168 counting only the distinct ones).

The product of its (nonzero) digits is 257191200, while the sum is 72.

The spelling of 166099798755 in words is "one hundred sixty-six billion, ninety-nine million, seven hundred ninety-eight thousand, seven hundred fifty-five".