8120664 has 24 divisors (see below), whose sum is σ = 21993660. Its totient is φ = 2706864.

The previous prime is 8120659. The next prime is 8120677. The reversal of 8120664 is 4660218.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56322 + ... + 56465.

Almost surely, 2^8120664 is an apocalyptic number.

It is an amenable number.

8120664 is an abundant number, since it is smaller than the sum of its proper divisors (13872996).

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

8120664 is a wasteful number, since it uses less digits than its factorization.

8120664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112799 (or 112792 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 8120664 is about 2849.6778765327. The cubic root of 8120664 is about 201.0005197878. Note that the first 3 decimals are identical.

The spelling of 8120664 in words is "eight million, one hundred twenty thousand, six hundred sixty-four".