665531346 has 16 divisors (see below), whose sum is σ = 1338758784. Its totient is φ = 220561104.

The previous prime is 665531329. The next prime is 665531371. The reversal of 665531346 is 643135566.

It is a happy 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, 319546 + ... + 321621.

It is an arithmetic number, because the mean of its divisors is an integer number (83672424).

Almost surely, 2^665531346 is an apocalyptic number.

665531346 is an abundant number, since it is smaller than the sum of its proper divisors (673227438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665531346 is a wasteful number, since it uses less digits than its factorization.

665531346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641345.

The product of its digits is 194400, while the sum is 39.

The square root of 665531346 is about 25797.8942163891. The cubic root of 665531346 is about 873.0842859908.

The spelling of 665531346 in words is "six hundred sixty-five million, five hundred thirty-one thousand, three hundred forty-six".