665323692 has 96 divisors (see below), whose sum is σ = 1743565824. Its totient is φ = 195720000.

The previous prime is 665323609. The next prime is 665323697. The reversal of 665323692 is 296323566.

It is not an unprimeable number, because it can be changed into a prime (665323697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1424443 + ... + 1424909.

It is an arithmetic number, because the mean of its divisors is an integer number (18162144).

Almost surely, 2^665323692 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665323692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871782912).

665323692 is an abundant number, since it is smaller than the sum of its proper divisors (1078242132).

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

665323692 is a wasteful number, since it uses less digits than its factorization.

665323692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779 (or 777 counting only the distinct ones).

The product of its digits is 349920, while the sum is 42.

The square root of 665323692 is about 25793.8692715924. The cubic root of 665323692 is about 872.9934721849.

The spelling of 665323692 in words is "six hundred sixty-five million, three hundred twenty-three thousand, six hundred ninety-two".