664841554002 has 96 divisors (see below), whose sum is σ = 1580417879040. Its totient is φ = 201081185280.

The previous prime is 664841554001. The next prime is 664841554021. The reversal of 664841554002 is 200455148466.

It is a happy number.

664841554002 is a `hidden beast` number, since 6 + 64 + 8 + 41 + 5 + 540 + 0 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (664841554001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2361574 + ... + 2628062.

It is an arithmetic number, because the mean of its divisors is an integer number (16462686240).

Almost surely, 2^664841554002 is an apocalyptic number.

664841554002 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 664841554002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (790208939520).

664841554002 is an abundant number, since it is smaller than the sum of its proper divisors (915576325038).

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

664841554002 is a wasteful number, since it uses less digits than its factorization.

664841554002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266808 (or 266805 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 664841554002 in words is "six hundred sixty-four billion, eight hundred forty-one million, five hundred fifty-four thousand, two".