671665310624 has 96 divisors (see below), whose sum is σ = 1652939882496. Its totient is φ = 261004158720.

The previous prime is 671665310597. The next prime is 671665310633. The reversal of 671665310624 is 426013566176.

It is a super-2 number, since 2×671665310624² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 587849 + ... + 1299575.

It is an arithmetic number, because the mean of its divisors is an integer number (17218123776).

Almost surely, 2^671665310624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671665310624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826469941248).

671665310624 is an abundant number, since it is smaller than the sum of its proper divisors (981274571872).

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

671665310624 is a wasteful number, since it uses less digits than its factorization.

671665310624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712138 (or 712130 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 47.

It can be divided in two parts, 671665 and 310624, that added together give a palindrome (982289).

The spelling of 671665310624 in words is "six hundred seventy-one billion, six hundred sixty-five million, three hundred ten thousand, six hundred twenty-four".