8415664 has 10 divisors (see below), whose sum is σ = 16305380. Its totient is φ = 4207824.

The previous prime is 8415661. The next prime is 8415691. The reversal of 8415664 is 4665148.

8415664 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (8415661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262974 + ... + 263005.

It is an arithmetic number, because the mean of its divisors is an integer number (1630538).

Almost surely, 2^8415664 is an apocalyptic number.

It is an amenable number.

8415664 is a deficient number, since it is larger than the sum of its proper divisors (7889716).

8415664 is a wasteful number, since it uses less digits than its factorization.

8415664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525987 (or 525981 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 8415664 is about 2900.9763873565. The cubic root of 8415664 is about 203.4055487168.

The spelling of 8415664 in words is "eight million, four hundred fifteen thousand, six hundred sixty-four".