664838826126 has 32 divisors (see below), whose sum is σ = 1372740397056. Its totient is φ = 214437588000.

The previous prime is 664838826103. The next prime is 664838826167. The reversal of 664838826126 is 621628838466.

It is a self number, because there is not a number n which added to its sum of digits gives 664838826126.

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, 1313836 + ... + 1748096.

It is an arithmetic number, because the mean of its divisors is an integer number (42898137408).

Almost surely, 2^664838826126 is an apocalyptic number.

664838826126 is an abundant number, since it is smaller than the sum of its proper divisors (707901570930).

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

664838826126 is a wasteful number, since it uses less digits than its factorization.

664838826126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442528.

The product of its digits is 31850496, while the sum is 60.

The spelling of 664838826126 in words is "six hundred sixty-four billion, eight hundred thirty-eight million, eight hundred twenty-six thousand, one hundred twenty-six".