679999450505 has 8 divisors (see below), whose sum is σ = 833361028992. Its totient is φ = 532425101488.

The previous prime is 679999450489. The next prime is 679999450513. The reversal of 679999450505 is 505054999976.

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 679999450505 - 2⁴ = 679999450489 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 1446807107 + ... + 1446807576.

It is an arithmetic number, because the mean of its divisors is an integer number (104170128624).

Almost surely, 2^679999450505 is an apocalyptic number.

It is an amenable number.

679999450505 is a deficient number, since it is larger than the sum of its proper divisors (153361578487).

679999450505 is a wasteful number, since it uses less digits than its factorization.

679999450505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893614735.

The product of its (nonzero) digits is 137781000, while the sum is 68.

The spelling of 679999450505 in words is "six hundred seventy-nine billion, nine hundred ninety-nine million, four hundred fifty thousand, five hundred five".