166261640035 has 16 divisors (see below), whose sum is σ = 202274560800. Its totient is φ = 131176604416.

The previous prime is 166261640003. The next prime is 166261640053. The reversal of 166261640035 is 530046162661.

It is a cyclic number.

It is not a de Polignac number, because 166261640035 - 2⁵ = 166261640003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166261640035.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307129 + ... + 653338.

It is an arithmetic number, because the mean of its divisors is an integer number (12642160050).

Almost surely, 2^166261640035 is an apocalyptic number.

166261640035 is a deficient number, since it is larger than the sum of its proper divisors (36012920765).

166261640035 is an equidigital number, since it uses as much as digits as its factorization.

166261640035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960950.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 166261640035 in words is "one hundred sixty-six billion, two hundred sixty-one million, six hundred forty thousand, thirty-five".