665331492 has 24 divisors (see below), whose sum is σ = 1774217536. Its totient is φ = 190094688.

The previous prime is 665331481. The next prime is 665331503. The reversal of 665331492 is 294133566.

It is an interprime number because it is at equal distance from previous prime (665331481) and next prime (665331503).

It is a self number, because there is not a number n which added to its sum of digits gives 665331492.

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 7 ways as a sum of consecutive naturals, for example, 3960223 + ... + 3960390.

Almost surely, 2^665331492 is an apocalyptic number.

It is an amenable number.

665331492 is an abundant number, since it is smaller than the sum of its proper divisors (1108886044).

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

665331492 is a wasteful number, since it uses less digits than its factorization.

665331492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7920627 (or 7920625 counting only the distinct ones).

The product of its digits is 116640, while the sum is 39.

The square root of 665331492 is about 25794.0204698686. The cubic root of 665331492 is about 872.9968837185.

The spelling of 665331492 in words is "six hundred sixty-five million, three hundred thirty-one thousand, four hundred ninety-two".