166043210255 has 16 divisors (see below), whose sum is σ = 214613673120. Its totient is φ = 122596664448.

The previous prime is 166043210243. The next prime is 166043210269. The reversal of 166043210255 is 552012340661.

It is a Cunningham number, because it is equal to 407484²-1.

It is a cyclic number.

It is not a de Polignac number, because 166043210255 - 2²² = 166039015951 is a prime.

It is a super-2 number, since 2×166043210255² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203744 + ... + 611226.

It is an arithmetic number, because the mean of its divisors is an integer number (13413354570).

Almost surely, 2^166043210255 is an apocalyptic number.

166043210255 is a deficient number, since it is larger than the sum of its proper divisors (48570462865).

166043210255 is a wasteful number, since it uses less digits than its factorization.

166043210255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413770.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 166043210255 in words is "one hundred sixty-six billion, forty-three million, two hundred ten thousand, two hundred fifty-five".