687222667 has 8 divisors (see below), whose sum is σ = 697533120. Its totient is φ = 676969920.

The previous prime is 687222661. The next prime is 687222677. The reversal of 687222667 is 766222786.

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

It is a cyclic number.

It is not a de Polignac number, because 687222667 - 2¹⁹ = 686698379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687222661) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9873 + ... + 38365.

It is an arithmetic number, because the mean of its divisors is an integer number (87191640).

Almost surely, 2^687222667 is an apocalyptic number.

687222667 is a deficient number, since it is larger than the sum of its proper divisors (10310453).

687222667 is a wasteful number, since it uses less digits than its factorization.

687222667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28853.

The product of its digits is 677376, while the sum is 46.

The square root of 687222667 is about 26214.9321380010. The cubic root of 687222667 is about 882.4683912526.

The spelling of 687222667 in words is "six hundred eighty-seven million, two hundred twenty-two thousand, six hundred sixty-seven".