665149933 has 16 divisors (see below), whose sum is σ = 768119040. Its totient is φ = 564195456.

The previous prime is 665149931. The next prime is 665149951. The reversal of 665149933 is 339941566.

It is a cyclic number.

It is not a de Polignac number, because 665149933 - 2¹ = 665149931 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665149931) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 372160 + ... + 373942.

It is an arithmetic number, because the mean of its divisors is an integer number (48007440).

Almost surely, 2^665149933 is an apocalyptic number.

It is an amenable number.

665149933 is a deficient number, since it is larger than the sum of its proper divisors (102969107).

665149933 is a wasteful number, since it uses less digits than its factorization.

665149933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316.

The product of its digits is 524880, while the sum is 46.

The square root of 665149933 is about 25790.5008287935. The cubic root of 665149933 is about 872.9174672358.

The spelling of 665149933 in words is "six hundred sixty-five million, one hundred forty-nine thousand, nine hundred thirty-three".