7867984664 has 64 divisors (see below), whose sum is σ = 16168140000. Its totient is φ = 3575190528.

The previous prime is 7867984661. The next prime is 7867984699. The reversal of 7867984664 is 4664897687.

It is a self number, because there is not a number n which added to its sum of digits gives 7867984664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7867984661) 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, 686372 + ... + 697740.

Almost surely, 2^7867984664 is an apocalyptic number.

It is an amenable number.

7867984664 is an abundant number, since it is smaller than the sum of its proper divisors (8300155336).

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

7867984664 is a wasteful number, since it uses less digits than its factorization.

7867984664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11580 (or 11576 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 65.

The square root of 7867984664 is about 88701.6609991042. The cubic root of 7867984664 is about 1988.9376469865.

The spelling of 7867984664 in words is "seven billion, eight hundred sixty-seven million, nine hundred eighty-four thousand, six hundred sixty-four".