16478664 has 16 divisors (see below), whose sum is σ = 41196720. Its totient is φ = 5492880.

The previous prime is 16478663. The next prime is 16478669. The reversal of 16478664 is 46687461.

It is not an unprimeable number, because it can be changed into a prime (16478663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343282 + ... + 343329.

It is an arithmetic number, because the mean of its divisors is an integer number (2574795).

Almost surely, 2^16478664 is an apocalyptic number.

It is an amenable number.

16478664 is an abundant number, since it is smaller than the sum of its proper divisors (24718056).

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

16478664 is a wasteful number, since it uses less digits than its factorization.

16478664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686620 (or 686616 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 16478664 is about 4059.3920727124. The cubic root of 16478664 is about 254.4723885217.

The spelling of 16478664 in words is "sixteen million, four hundred seventy-eight thousand, six hundred sixty-four".