665828942 has 8 divisors (see below), whose sum is σ = 1021970136. Its totient is φ = 325172232.

The previous prime is 665828941. The next prime is 665828957. The reversal of 665828942 is 249828566.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665828941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3871013 + ... + 3871184.

It is an arithmetic number, because the mean of its divisors is an integer number (127746267).

Almost surely, 2^665828942 is an apocalyptic number.

665828942 is a deficient number, since it is larger than the sum of its proper divisors (356141194).

665828942 is a wasteful number, since it uses less digits than its factorization.

665828942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7742242.

The product of its digits is 1658880, while the sum is 50.

The square root of 665828942 is about 25803.6614068624. The cubic root of 665828942 is about 873.2144014115.

The spelling of 665828942 in words is "six hundred sixty-five million, eight hundred twenty-eight thousand, nine hundred forty-two".