665452892 has 12 divisors (see below), whose sum is σ = 1254122856. Its totient is φ = 307132080.

The previous prime is 665452891. The next prime is 665452939. The reversal of 665452892 is 298254566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665452891) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6398534 + ... + 6398637.

It is an arithmetic number, because the mean of its divisors is an integer number (104510238).

Almost surely, 2^665452892 is an apocalyptic number.

It is an amenable number.

665452892 is a deficient number, since it is larger than the sum of its proper divisors (588669964).

665452892 is a wasteful number, since it uses less digits than its factorization.

665452892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12797188 (or 12797186 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 47.

The square root of 665452892 is about 25796.3736211119. The cubic root of 665452892 is about 873.0499777414.

The spelling of 665452892 in words is "six hundred sixty-five million, four hundred fifty-two thousand, eight hundred ninety-two".