669997214 has 8 divisors (see below), whose sum is σ = 1005559248. Its totient is φ = 334810800.

The previous prime is 669997213. The next prime is 669997231. The reversal of 669997214 is 412799966.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669997213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89402 + ... + 96605.

It is an arithmetic number, because the mean of its divisors is an integer number (125694906).

Almost surely, 2^669997214 is an apocalyptic number.

669997214 is a deficient number, since it is larger than the sum of its proper divisors (335562034).

669997214 is a wasteful number, since it uses less digits than its factorization.

669997214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187810.

The product of its digits is 1469664, while the sum is 53.

The square root of 669997214 is about 25884.3043947486. The cubic root of 669997214 is about 875.0327994236.

The spelling of 669997214 in words is "six hundred sixty-nine million, nine hundred ninety-seven thousand, two hundred fourteen".