667400066 has 8 divisors (see below), whose sum is σ = 1001365824. Its totient is φ = 333611460.

The previous prime is 667400011. The next prime is 667400081. The reversal of 667400066 is 660004766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 667399999 and 667400035.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34430 + ... + 50201.

It is an arithmetic number, because the mean of its divisors is an integer number (125170728).

Almost surely, 2^667400066 is an apocalyptic number.

667400066 is a deficient number, since it is larger than the sum of its proper divisors (333965758).

667400066 is a wasteful number, since it uses less digits than its factorization.

667400066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88576.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 667400066 is about 25834.0872879225. The cubic root of 667400066 is about 873.9006890041.

The spelling of 667400066 in words is "six hundred sixty-seven million, four hundred thousand, sixty-six".