66994466 has 48 divisors (see below), whose sum is σ = 131984640. Its totient is φ = 25189920.

The previous prime is 66994453. The next prime is 66994481. The reversal of 66994466 is 66449966.

It is a happy number.

66994466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30191 + ... + 32333.

It is an arithmetic number, because the mean of its divisors is an integer number (2749680).

Almost surely, 2^66994466 is an apocalyptic number.

66994466 is a deficient number, since it is larger than the sum of its proper divisors (64990174).

66994466 is a wasteful number, since it uses less digits than its factorization.

66994466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199 (or 2192 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 50.

The square root of 66994466 is about 8185.0147220393. The cubic root of 66994466 is about 406.1436273450.

The spelling of 66994466 in words is "sixty-six million, nine hundred ninety-four thousand, four hundred sixty-six".