166458028641 has 8 divisors (see below), whose sum is σ = 221947345440. Its totient is φ = 110970365472.

The previous prime is 166458028603. The next prime is 166458028673. The reversal of 166458028641 is 146820854661.

166458028641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166458028641 - 2⁹ = 166458028129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166458028441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 155551 + ... + 597588.

It is an arithmetic number, because the mean of its divisors is an integer number (27743418180).

Almost surely, 2^166458028641 is an apocalyptic number.

It is an amenable number.

166458028641 is a deficient number, since it is larger than the sum of its proper divisors (55489316799).

166458028641 is an equidigital number, since it uses as much as digits as its factorization.

166458028641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826815.

The product of its (nonzero) digits is 2211840, while the sum is 51.

The spelling of 166458028641 in words is "one hundred sixty-six billion, four hundred fifty-eight million, twenty-eight thousand, six hundred forty-one".