1679398665 has 16 divisors (see below), whose sum is σ = 3070900608. Its totient is φ = 767725056.

The previous prime is 1679398639. The next prime is 1679398673. The reversal of 1679398665 is 5668939761.

It is not a de Polignac number, because 1679398665 - 2¹¹ = 1679396617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1679398599 and 1679398608.

It is an unprimeable number.

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, 7997032 + ... + 7997241.

It is an arithmetic number, because the mean of its divisors is an integer number (191931288).

Almost surely, 2^1679398665 is an apocalyptic number.

1679398665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1679398665 is a deficient number, since it is larger than the sum of its proper divisors (1391501943).

1679398665 is a wasteful number, since it uses less digits than its factorization.

1679398665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15994288.

The product of its digits is 14696640, while the sum is 60.

The square root of 1679398665 is about 40980.4668714255. The cubic root of 1679398665 is about 1188.6425367888.

The spelling of 1679398665 in words is "one billion, six hundred seventy-nine million, three hundred ninety-eight thousand, six hundred sixty-five".