66399468 has 12 divisors (see below), whose sum is σ = 154932120. Its totient is φ = 22133152.

The previous prime is 66399451. The next prime is 66399481. The reversal of 66399468 is 86499366.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 66399468.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2766633 + ... + 2766656.

It is an arithmetic number, because the mean of its divisors is an integer number (12911010).

Almost surely, 2^66399468 is an apocalyptic number.

It is an amenable number.

66399468 is an abundant number, since it is smaller than the sum of its proper divisors (88532652).

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

66399468 is a wasteful number, since it uses less digits than its factorization.

66399468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5533296 (or 5533294 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 51.

The square root of 66399468 is about 8148.5868713538. The cubic root of 66399468 is about 404.9376889352.

The spelling of 66399468 in words is "sixty-six million, three hundred ninety-nine thousand, four hundred sixty-eight".