999999670 has 16 divisors (see below), whose sum is σ = 1905882048. Its totient is φ = 376470400.

The previous prime is 999999667. The next prime is 999999677. The reversal of 999999670 is 76999999.

It is a junction number, because it is equal to n+sod(n) for n = 999999596 and 999999605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999677) 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, 2941006 + ... + 2941345.

It is an arithmetic number, because the mean of its divisors is an integer number (119117628).

Almost surely, 2^999999670 is an apocalyptic number.

999999670 is a deficient number, since it is larger than the sum of its proper divisors (905882378).

999999670 is a wasteful number, since it uses less digits than its factorization.

999999670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882375.

The product of its (nonzero) digits is 22320522, while the sum is 67.

The square root of 999999670 is about 31622.7713839252. The cubic root of 999999670 is about 999.9998900000. Note that the first 3 decimals are identical.

The spelling of 999999670 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred seventy".