667699214 has 32 divisors (see below), whose sum is σ = 1235914176. Its totient is φ = 263450880.

The previous prime is 667699213. The next prime is 667699217. The reversal of 667699214 is 412996766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667699213) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 67634 + ... + 76874.

It is an arithmetic number, because the mean of its divisors is an integer number (38622318).

Almost surely, 2^667699214 is an apocalyptic number.

667699214 is a deficient number, since it is larger than the sum of its proper divisors (568214962).

667699214 is a wasteful number, since it uses less digits than its factorization.

667699214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9660.

The product of its digits is 979776, while the sum is 50.

The square root of 667699214 is about 25839.8764315931. The cubic root of 667699214 is about 874.0312386833.

The spelling of 667699214 in words is "six hundred sixty-seven million, six hundred ninety-nine thousand, two hundred fourteen".