665679346 has 8 divisors (see below), whose sum is σ = 999432540. Its totient is φ = 332535168.

The previous prime is 665679331. The next prime is 665679347. The reversal of 665679346 is 643976566.

It can be written as a sum of positive squares in 2 ways, for example, as 607080321 + 58599025 = 24639^2 + 7655^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 665679293 and 665679302.

It is not an unprimeable number, because it can be changed into a prime (665679347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149511 + ... + 153898.

Almost surely, 2^665679346 is an apocalyptic number.

665679346 is a deficient number, since it is larger than the sum of its proper divisors (333753194).

665679346 is a wasteful number, since it uses less digits than its factorization.

665679346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304508.

The product of its digits is 4898880, while the sum is 52.

The square root of 665679346 is about 25800.7625081120. The cubic root of 665679346 is about 873.1489996455.

The spelling of 665679346 in words is "six hundred sixty-five million, six hundred seventy-nine thousand, three hundred forty-six".