665133623 has 32 divisors (see below), whose sum is σ = 849139200. Its totient is φ = 505964160.

The previous prime is 665133593. The next prime is 665133631. The reversal of 665133623 is 326331566.

665133623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 665133623 - 2⁸ = 665133367 is a prime.

It is a super-2 number, since 2×665133623² = 884805472890212258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665133643) 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, 1424036 + ... + 1424502.

It is an arithmetic number, because the mean of its divisors is an integer number (26535600).

Almost surely, 2^665133623 is an apocalyptic number.

665133623 is a deficient number, since it is larger than the sum of its proper divisors (184005577).

665133623 is a wasteful number, since it uses less digits than its factorization.

665133623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its digits is 58320, while the sum is 35.

The square root of 665133623 is about 25790.1846251631. The cubic root of 665133623 is about 872.9103323030.

The spelling of 665133623 in words is "six hundred sixty-five million, one hundred thirty-three thousand, six hundred twenty-three".