8446664280 has 64 divisors (see below), whose sum is σ = 25369666560. Its totient is φ = 2249806208.

The previous prime is 8446664273. The next prime is 8446664287. The reversal of 8446664280 is 824666448.

It is an interprime number because it is at equal distance from previous prime (8446664273) and next prime (8446664287).

It is a super-2 number, since 2×8446664280² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8446664287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62779 + ... + 144341.

It is an arithmetic number, because the mean of its divisors is an integer number (396401040).

Almost surely, 2^8446664280 is an apocalyptic number.

It is an amenable number.

8446664280 is an abundant number, since it is smaller than the sum of its proper divisors (16923002280).

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

8446664280 is a wasteful number, since it uses less digits than its factorization.

8446664280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82440 (or 82436 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 48.

The square root of 8446664280 is about 91905.7358384122. The cubic root of 8446664280 is about 2036.5500030350.

The spelling of 8446664280 in words is "eight billion, four hundred forty-six million, six hundred sixty-four thousand, two hundred eighty".