428106081966 has 16 divisors (see below), whose sum is σ = 866527974144. Its totient is φ = 140982725624.

The previous prime is 428106081961. The next prime is 428106081973. The reversal of 428106081966 is 669180601824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428106081961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429824886 + ... + 429825881.

It is an arithmetic number, because the mean of its divisors is an integer number (54157998384).

Almost surely, 2^428106081966 is an apocalyptic number.

428106081966 is an abundant number, since it is smaller than the sum of its proper divisors (438421892178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428106081966 is a wasteful number, since it uses less digits than its factorization.

428106081966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859650855.

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 428106081966 in words is "four hundred twenty-eight billion, one hundred six million, eighty-one thousand, nine hundred sixty-six".