664841535402 has 256 divisors, whose sum is σ = 1639533772800. Its totient is φ = 177409440000.

The previous prime is 664841535373. The next prime is 664841535427. The reversal of 664841535402 is 204535148466.

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 127 ways as a sum of consecutive naturals, for example, 113625777 + ... + 113631627.

It is an arithmetic number, because the mean of its divisors is an integer number (6404428800).

Almost surely, 2^664841535402 is an apocalyptic number.

664841535402 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 664841535402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (819766886400).

664841535402 is an abundant number, since it is smaller than the sum of its proper divisors (974692237398).

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

664841535402 is a wasteful number, since it uses less digits than its factorization.

664841535402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6033.

The product of its (nonzero) digits is 2764800, while the sum is 48.

The spelling of 664841535402 in words is "six hundred sixty-four billion, eight hundred forty-one million, five hundred thirty-five thousand, four hundred two".